**On a class of regular functions,**Dokl. AN SSSR**110**, (1956), \# 1, 27-30 (in Russian).**On a subcone of the cone of the regular-monotone functions, the sighs of the derivatives of which change periodically**God. Sof. Univ. Phis.-Math. Fac.,**50**, (1958), n. 1, 109-120 (in Bulgarian).**On the expansion of the regular-monotone function in Goncharov series,**Dokl. AN SSSR**118**(1958) n. 3, 450-453 (in Russian).**On a type of regular-monotone functions,**Izv. Math. Inst. BAS,**3**, (1958), n. 1, 89-104 (in Bulgarian).**A note on the theorem of Gauss for the distribution of the zeros of a polynomial on the complex plane,**Fiz.-math. sp.,**1**, (1958) n. 3-4, 169-171 (with T. Genchev, in Bulgarian).**An integral inequality for algebraic polynomials with only real zeros,**God. Sof. Univ. Phis.-Math. Fac.,**53**(1959), n. 1, 19-32 (in Bulgarian).**Symmetrical flow around circular cylinder with two vortices behind it. Trajectory of the vortices and resistance of the cylinder,**Dokl. AN SSSR**128**(1959), n. 1, 53-59 (with Bl. Dolapchiev, in Russian).**On some properties of the regular-monotone functions,**Izv. Math. Inst. of BAS,**3**, (1959), n. 2, 63-68.**The trajectory of a vortex pair behind a circular cylinder and it's connection with the resistance of the cylinder,**Izv. Math. Inst. of BAS,**3**(1959), n. 2, 213-243 (with Bl. Dolapchiev, in Bulgarian).**The Theorem of Vahlen for singular continued fractions and continued fractions of the nearest natural number,**God. Sof. Univ. Phis.-Math. Fac.,**54**, (1961), n. 1, 251-258 (in Bulgarian).**On the equations in words,**Z. math. Logik Grundlagen Math. (Berlin),**7**, (1961). 289-297 (in Russian, with D. Skordev).**$\varepsilon$-entropy and $\varepsilon$-capacity of the set of continuous functions,**Vestnik MGU,**17**, (1962), n. 3, 15-19 (in Russian, with S. Dimiev and B. Penkov).**$\varepsilon$-entropy and $\varepsilon$-capacity of the set of continuous curves,**Vestnik MGU,**17**, (1962), n. 3, 20-23 (in Russian, with B. Penkov).**Approximation of functions with algebraic polynomials in respect to a metric of Hausdorff type,**God. Sof. Univ. Phis.-Math. Fac.,**55**, (1962), 1-39 (in Bulgarian).**Eine Aufgabe aus der Kombinatorik,**C. r. Acad. Bulgare Sci.,**15**, (1962), n. 1, 5-8.**Graphs, connected with mechanisms,**C. r. Acad. Bulgare Sci.,**15**, (1962), n. 2, 111-113 (in Russian, with N. Martinov).**Frequencies of Letters in Written Bulgarian,**C. r. Acad. Bulgare Sci.,**15**, (1962). n. 3, 243-244 (with B. Penkov and others).**$\varepsilon$-entropy and $\varepsilon$-capacity of the space of continuous functions,**Izv. Math. Inst. of BAS,**6**, (1962), 27-50 (with B. Penkov, in Bulgarian).**Machines for education,**Sp. Mathematica, Sofia,**1**, (1962) n. 2, 32-35 (with B. Penkov, in Bulgarian).**Let us think on mathematics,**Sp. Mathematica, Sofia, (1962), n. 1, 4-6 (with B. Penkov, in Bulgarian).**Rational zeros of algebraic equations,**Sp. Mathematica, Sofia,}**0**, (1962), n. 1, 27-30 (in Bulgarian).**Graphs with a completeness operation,**God. Sof. Univ. Phis.-Math. Fac.,**54**, (1963), n. 1, 127-139 (with N. Martinov, in Bulgarian).**Axiomatic and automatic verification of block- schemes,**God. Sof. Univ. Phis.- Math. Fac.,**56**, (1963), n. 1, 158-190 (with E. Dimitrov and V. Spiridonov, in Bulgarian).**On the best approximation with algebraic polynomials in respect to Hausdorff distance,**God. Sof. Univ. Phis.-Math. Fac.,**56**, (1963), n. 1, 195-207 (in Bulgarian).**$\varepsilon$-entropy and $\varepsilon$-capacity of the set of the monotone functions,**Uspehi math. nauk,**18**, (1963), n. 2, 155-158 (in Russian).**Axiomatik der Blokschemata und automatische Programmkontrolle,**in: Int. Kolloquium, uber aktuelle Probleme der Rechentechnik. II. Dresden, 1962. Vortrage, Dresden, 1963, 61-63.**Approximation bezuglich einer Hausdorffschen Metrik mittels algebraischer Polynome,**in: Int. Kolloquium uber aktuelle Problemeder Rechentechnik. II. Dresden, 1962. Vortrage, Dresden, 1963, 121-122.**Machines helping the human brain,**Narodna prosveta, Sofia 1963 (in Bulgarian).**Bulgaria is building socialism,**Sp. Mathematica, Sofia,**1**, (1963) n. 6, 1-3 (in Bulgarian).**Approximation of functions with algebraic polynomials in respect to a metric of the Hausdorff type,**Review of the PhD thesis, Sofia University, 1964.**On the graphs with a completeness operation,**God. Sof. Univ. Phis.-Math. Fac.,**57**, (1964) 291-305 (with N. Martinov, in Bulgarian).**Mathematics and computing technic,**God. Sof. Univ. Phis.-Math. Fac.,**57**, (1964) 307-316 (in Bulgarian).**Entropy of the continuous functions of many variables,**C. r. Acad. Bulgare Sci.,**17**, (1964), n. 4, 335-337 (with B. Penkov, in Russian).**On widths of the space of continuous functions,**C. r. Acad. Bulgare Sci.,**17**, (1964), n. 8, 689-691 (with B. Penkov).**On a method for approximation of periodic functions with trigonometric polynomials,**Tr. Math. Inst. Hungarian Acad. of Sciences,**9A**(1964) n. 3, 491-494. (with G. Freud, in Russian).**Figures with constant width,**Sp. Mathematics, Sofia,**3**, (1964), n. 1, 12-15 (in Bulgarian).**On the theory of graphs,**Sp. Mathematica, Sofia,**3**, (1964), n. 6, 1-5 (in Bulgarian).**On some linear methods for approximation of periodic functions in respect to the Hausdorff distance,**God. Sof. Univ. Phis.- Math. Fac.,**58**, (1965), 107-140 (in Bulgarian).**Linear methods for approximation of periodic functions in respect to a metric of Hausdorff type,**Dokl. AN SSSR}**160**(1965), n. 5, 1023-1025 (in Russian).**Linear methods for approximating periodic functions with respect to a metric of Hausdorff type,**C. r. Acad. Bulgare Sci.,**18**, (1965), n. 5, 253-255.**On an estimate of the approximation of functions with Bernschtein polynomials,**Mathematica, Cluj,**7**, (1965) n. 1, 145-154.**Orthogonale Systeme in einigen Klassen von Polynomenfolgen,**Wiss. Z. Hochsch. Architektur Bauwesen, Weimar,**12**, (1965), n. 5-6, 517 - 519 (with L. Iliev).**Contemporary calculating machines,**Sp. Mathematica, Sofia,**4**, (1965), n. 2, 8-16; n. 3, 10-16; n. 4, 13-19; n. 6, 27-31 (in Bulgarian).**On some properties of the Hausdorff metric,**Mathematica, Cluj,**7**, (1965), n. 1, 145-154 (with V. Popov).**On the best approximation in respect to the Hausdorff distance,**God. Sof. Univ. Phis.-Maih. Fac.,**59**, (1966), 85-103 (in Bulgarian).**A model of the regulatory mechanism of cellular proliferation,**C. r. Acad. Bulgare Sci.,**19**, (1966), n. 9, 835-838 (with R. Tzanev).**A model of the regulatory mechanism of cellular multiplication,**J. Theoret. Biol., New York,**12**, (1966), 327-341 (with R. Tzanev).**Hausdorffsche Metrik und Approximationen,**Numerische Math., Berlin,**9**, (1966), 214-226 (with B. Penkov).**Electronic machines,**Technika, Sofia, 1966 (in Bulgarian, with D. Bogdanov and others).**Mathematical methods for classification,**Sp. Mathematica, Sofia,**5**, (1966), n. 5, 16-20. (in Bulgarian).**Approximation of plane point sets with polynomial curves,**God. Sof. Univ. Math. Fac.,**60**, (1967), 211-222 (in Bulgarian).**On the convergence of a sequence of linear positive operators,**God. Sof. Univ. Math. Fac.,**60**, (1967), 279-296 (in Bulgarian).**On P. Korovkin's Theorems for Convergence of Sequences of Linear Positive Openitors,**Dokl. AN SSSR,**177**, (1967), n. 3, 518-520 (in Russian); Soviet Math. Dokl.,**8**, (1967), n. 6, 1445-1447.**On the interpolational process of Fejer**Izv. Math. Inst. BAS,**9**, (1967), 133-145.**Approximation with stepwise functions with respect to Hausdorff distance,**Math. Zametki**2**, (1967), n. 1, 61-67 (in Russian).**Distance,**Fiz.-math, sp., Sofia,**6**, (1967) n. 2, 14-17.**On the numerical calculation of a class of polynomials of best approximation,**God. Sof. Univ. Math. Fac.,**61**, (1968), 17-27 (with Sv. Markov, in Bulgarian).**Modeling of the regulatory mechanism of the cellular proliferation in the liver,**Central. Biochem. Lab. BAS,**3**, (1968), 21-35 (with R. Tzanev).**Approximation with respect to Hausdorff distance,**Math. Zametki,**3**, (1968), n. 4, 481-494 (in Russian; DSc thesis, Moscow, 1967).**Computer studies on the mechanism controlling cellular proliferation,**in: Effects on radiation on cellular proliferation and differentiation. Vienna, Int. Atomic Energy Agency. 1968, 453-461 (with R. Tzanev).**Computer simulation of the regenerative processes in the liver,**J. Theoret. Biol., New York,**18**, (1968), 90-104 (with R. Tzanev).**Electronic calculating machines,**MNP, Sofia, 1968 (in Bulgarian).**Convergence of the derivatives of the linear positive operators,**C. r. Acad. Bulgare Sci.**22**, (1969), n. 5, 507-509 (in Russian).**A possible mechanism for cellular differentiation,**C. r. Acad. Bulgare Sci.,**22**, (1969), n. 12, 1433-1436 (with R. Tzanev).**On the widths of the space of the continuous functions,**Izv. Math. Inst. BAS**10**, (1969), 5-15 (with B. Penkov, in Bulgarian).**Certain questions in the theory of approximation of functions and sets in the Hausdorff metric,**Uspehi Mat. Nauk,} {\bf 24}, (1969), n. 5, 143-180 (in Russian); Russian Math. Surveys,**24**, (1968), n. 5, 143-183.**Computer simulation of the regulatory mechanisms of cellular proliferation,**Inform. Processing, Amsterdam,**68**(1969), 1506-1507 (with R. Tzanev).**A model of cancer studies by a computer,**J. Theoret. Biol., New York,**23**, (1969), 124-134 (with R. Tzanev).

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