%0 Journal Article %A Yu. A. Apresyan %T A~class of three-webs on a~four-dimensional manifold and corresponding third-order differential equations %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1985 %P 3-8 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1985_1_a0/ %G ru %F IVM_1985_1_a0