%0 Journal Article %A M. K. Likht %T Propagation of a perturbation in problems connected with degenerate quasi-linear equations of parabolic type %J Differencialʹnye uravneniâ %D 1966 %P 953-957 %V 2 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1966_2_7_a9/ %G ru %F DE_1966_2_7_a9