%0 Journal Article %A M. V. Tuvaev %T The “dead zone” theorem for a weakly degenerate quasilinear elliptic equation %J Differencialʹnye uravneniâ %D 1993 %P 349-352 %V 29 %N 2 %U http://geodesic.mathdoc.fr/item/DE_1993_29_2_a17/ %G ru %F DE_1993_29_2_a17