**Convergence of the derivatives of the linear operators,**in: Constructive function theory, Conf. in Blagoevgrad 1977, Publ. BAS, Sofia, 1980, 131-143 (in Russian).**On the estimate of the approximation with the Fejer's interpolational polynomial,**C. r. Acad. Bulgare Sci.,**33**, (1980), n. 11, 1447-1450 (with T. Mills).**Some Topics of Segment Analysis,**Interval Mathematics 1980, Ed. L. E. Nickel, Academic Press, 1980, 203-222.**Hausdorff synthesis of antenna lattices for scanning diagram of orientation.**Electroprom. and priborostr., Sofia,**5**(1981), 203-205 (with N. Kjurkchiev and others, in Bulgarian).**Some principals of mathematical modeling,**Impact of science on society,**31**, (1981), n. 4, 375-379.**Quelques principes de la modelisation mathematique,**Impact: science et societe,**31**, (1981), n. 4, 391-395.**On the Constants of H. Whitney,**C. r. Acad. Bulgare Sci.,**35**, (1982), n. 4, 431-434.**A New Proof of the H. Whitney's Theorem,**C. r. Acad. Bulgare Sci.,**35**, (1982), n. 5, 609-611.**Computation techniques, computer and education,**Impact of science and society, (1982) n. 1-2, 153-158 (in Russian).**Modified Steklov's function,**C. r. Acad. Bulgare Sci.,**36**, (1983), n. 3, 315-317 (in Russian).**Convergence of Numerical Methods,**in: Constructive function Theory '81, Sofia, 1983, 513-518.**Averaged moduli of smoothness,**Publ. BAS, Sofia, 1983 (with V. Popov, in Bulgarian).**Academician Ljubomir Iliev in the occasion of his 70 years,**Fiz.-math, sp., Sofia,**29**, (1983) n. 3, 169- 171 (in Bulgarian).**Academician Andrei Nikolaevich Kolmogorov (in the occasion of his 80 years jubilee),**Fiz.-math, sp., Sofia,**29**, (1983) n. 5, 72-74 (in Bulgarian).**On a Theorem of H. Whitney,**in: Constructive function Theory '84, Sofia, 1984, 808-813.**To Academician L. Iliev's 70th Anniversary,**in: Math. struct., Comput. math., Math. modeling, BAS, Sofia, 1984,**5-7**, 10-12 (in Russian).**Bulgarian Academy of Sciences in 105 years,**Spisanie BAS, Sofia,**20**, (1984), n. 5, 5-9 (in Bulgarian).**The Constants of H. Whitney are Bounded,**C. r. Acad. Bulgare Sci.,**38**, (1985), n. 10, 1299-1302.**Mathematical analysis,**Publ. Moscow University, Moscow, 1985 (with V. Il'in and V. Sadovnichii, in Russian).**Survey of the parallel computing,**Publ. BAS, Sofia, 1985 (with A. Andreev and others, in Bulgarian).**Inlormation and Knowledge,**in: Formal models in Programming, North- Holaind, IFIP, 1985, 97-101.**115 rocznica powstania Bulgarskiej Akademii Nauk,**Nauka Polska. (1985), n. 1-2, 153-i58.**Use of computers in education,**Problems of theory and practice of manegement, Moscow, (1985). n. 4, 57-60 (in Russian).**Problems of the computer education -- the second wave,**Sp. Math. education,**10**, (1985), n. 1, 2-7 (in Bulgarian).**Children in the information age,**Sp. Math. education,**10**, (1985), n. 3, 3-5 (in Bulgarian).**Information und Wissen,**in: Heinz Zemanek - Ein Computerpionier, R. Oldenbourg Wien M\"unchen, 1985, 91-93.**On a theorem of H. Whitney,**Dokl. AN SSSR**291**(1986), n. 6, 1296-1300 (in Russian).**The Theorem of Whitney for Integral Norm,**C. r. Acad. Bulgare Sci.,**39**, (1986), n. 10, 35-38.**Children in an Information Age, Tomorrow's Problems Today,**in: Children in an Information Age. Pergamon Press, Oxford, 1986, 195-200.**Informatics and computation technic,**Sp. BAS, Sofia,**32**, (1986) n. 1, 12-16 (in Bulgarian).**The computer is man made and has to be his servant,**Sp. Plamak, Sofia, (1986), n. 1, 7-12 (in Bulgarian).**Une education adaptee a l'ere de l'information,**Impact: science et societe, (1986), n. 146, 203-212.**On a Theorem of H. Whitney,**Soviet Math. Dokl.,**34**, (1987), n. 3, 603-606.**A Modified Steclov Function,**Amer. Math. Soc. Transl.,**137**, (1987), n. 2, 57-59.**On the Theorem and Constants of H. Whitney,**Constr. Approx.,**3**(1987), 1-11.**On a Theorem of Ju. Brudnyi,**Math. Balkanica,**1**, (1987), 106-111.**Mathematical analysis 2,**Publ. Moscow University, Moscow, 1987 (with V. ll'in and V. Sadovnichii, in Russian).**The Bulgarian Academy of Sciences: Yesterday, Today and Tomorrow,**Introducing Research Results into Practice, Publ. BAS, Sofia, (1987), 26-30.**Implementation of the research results of the Academy institutes in the People's Republic of Bulgaria,**Introducing Research Results into Practice Publ. BAS, Sofia, (1987). 63-68 (with J. Ivanov).**Art, science and education,**Acad. of art "Apolonia", Sozopol, 1987, 85-96 (in Bulgarian).**School mathematics in the information age,**in: Informatics and the teaching of mathematics, North-Holland, IFIP, 1987, 1-4.**Oncogenes and Genetic Networks,**Ber. Nat.-Med. Ver. Salzburg**9**, (1988), 183-184 (with R. Tzanev).**Averaged moduli of smoothness,**Publ. "Mir", Moskow, 1988 (with V. Popov, in Russian).**The Averaged Moduli of Smoothnes,**John Wiley & Sons, New York 1988, (with V. Popov).**Children in an Information Age,**Education \& Computing,**4**, (1988), 21-26..**High School Mathematics Education and Training of Mathematics Teachers in Bulgaria,**in: ICME-6, Budapest, Hungary, 1988 (with T. Vitanov and others).**For the rearrengement of the spiritual sphere,**Sp. BAS, Sofia,**34**, (1988), n. 6, 6-9 (in Bulgarian).**Informatics and education,**in: 5th Seminar, Problems of informatics and its appliccation in management of education and research, Sofia Univ., Sofia, 1988, 7-15 (in Bulgarian).**Informatics for peace,**Peace is a human value, Publ. BAS, Sofia, 1988 (in Bulgarian).**Sofia university "Kliment Ohridski" and the Bulgarian science,**Sp. BAS, Sofia**36**n. 6, (1988), 22-26 (in Bulgarian).**Approximation with least derivative,**C. r. Acad. Bulgare Sci.,**42**, (1998), n. 1, 27-30 (in Russian).**Approximation splines,**Math. Balkanica, (1989), n. 1, 106-121.**Fractals, Chaos and Approximation,**in: Information Processing '89, IF1P, No rlli- Holland, 1989, 589-590.**Neighborhood graphs on the plane,**Fiz.-math, sp., Sofia,**4**, (1989) n. 3-4, 281 - 300 (in Bulgarian).**Mathematical analysis 2,**Publ. "Nauka i Izkustvo", Sofia, 1989 (with V. Il'in and V. Sadovnichii, in Bulgarian).**Information as a Science and as a Tool,**in: ICSU Report of 26th Meeting oj the General Comm. Lisbon, Portugal, 11-14 Oct. 1989 and Scientific Lectures, 1989, 318-325.**A Broad View of Informatics,**Higher Education Policy,**2**, (1989), n. 4, 73-76.**The Bulgarian Academy of Sciences -- Center of Research and Innovation,**Bulgarian Foreign Trade, (1989), n. 3, 18-19.**Marin Drinov (1838-1906) -- the first President of BAS,**Sp. BAS, Sofia,**35**, (1989). n. 1, 5-10 (in Bulgarian).**Vassil D. Stojanov -- principal manager of the Bulgarian Literary Society,**Sp. BAS, Sofia.**35**, (1989), n. 5, 5-10 (in Bulgarian).**Bulgarian Academy of Sciences -- 120 years of tradition and innovation,**Sp. BAS. Sofia,**35**, (1989), n. 6, 3-9 (in Bulgarian).**Mathematical models of some termophisical processes and devises for molding and crystallization of steel,**in: Technology of metals, Conf. High alloy nitrogen steel '89, BAS, Sofia. 1989, 12-18 ( with R. Lazarov and C. Rashev, in Russian).

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