%0 Journal Article %A Sh. R. Sharipov %A S. Kh. Mamashev %T The exceptional directions of a~certain system of three differential equations %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1971 %P 114-117 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1971_3_a14/ %G ru %F IVM_1971_3_a14