%0 Journal Article %T Nikolai Dmitrievich Kopachevsky (on his seventieth birthday) %J Žurnal matematičeskoj fiziki, analiza, geometrii %D 2010 %P 246 %V 6 %N 2 %U http://geodesic.mathdoc.fr/item/JMAG_2010_6_2_a4/ %G ru %F JMAG_2010_6_2_a4