%0 Journal Article %A S. E. Pastukhova %T Degenerate equations of monotone type: Lavrent'ev phenomenon and attainability problems %J Sbornik. Mathematics %D 2007 %P 1465-1494 %V 198 %N 10 %U http://geodesic.mathdoc.fr/item/SM_2007_198_10_a4/ %G en %F SM_2007_198_10_a4