%0 Journal Article %A A. D. Sidorenko %T A theorem on the impossibility of a gradient catastrophe for a certain class of multidimensional systems of quasilinear equations %J Differencialʹnye uravneniâ %D 1974 %P 1328-1331 %V 10 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1974_10_7_a21/ %G ru %F DE_1974_10_7_a21