%0 Journal Article %A N. N. Yanenko %T On non-linear equations of a variable type %J Zapiski Nauchnykh Seminarov POMI %D 1980 %P 294-301 %V 96 %U http://geodesic.mathdoc.fr/item/ZNSL_1980_96_a27/ %G ru %F ZNSL_1980_96_a27