%0 Journal Article %A A. V. Borovskikh %A R. Mustafokulov %A K. P. Lazarev %A Yu. V. Pokorny %T On a class of fourth-order differential equations on a %J Doklady Akademii Nauk %D 1995 %P 730-732 %V 345 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1995_345_6_a1/ %G ru %F DAN_1995_345_6_a1