Owe  Axelsson,  KUN, Nijmegen, The Netherlands,
axelsson@sci.kun.nl

Radim Blaheta, Institute of Geonics AS CR, Ostrava, Czech Republic,
blaheta@ugn.cas.cz

Zdenek Dostal, Technical University, Ostrava, Czech Republic,
zdenek.dostal@vsb.cz

Isvan Farago, Eötvös Loránd University, Budapest, Hungary,
faragois@cs.elte.hu

Ivan  Georgiev,CLPP, Bulgarian Academy of Sciences, Sofia,
john@cantor.bas.bg

János Karátson, Eötvös Loránd University, Budapest, Hungary,
karatson@cs.elte.hu

Roman  Kohut, Institute of Geonics AS CR, Ostrava, Czech Republic,
kohut@ugn.cas.cz

Svetozar Margenov, CLPP, Bulgarian Academy of Sciences, Sofia,
margenov@cantor.bas.bg

Maya Neytcheva, KUN, Nijmegen, The Netherlands,
neytchev@sci.kun.nl