%0 Journal Article %A A. G. Popov %T A geometric approach to the interpretation of solutions of the %J Doklady Akademii Nauk %D 1990 %P 1109-1111 %V 312 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1990_312_5_a19/ %G ru %F DAN_1990_312_5_a19