@article{DE_1990_26_7_a3,
     author = {V. A. Galaktionov and S. A. Posashkov},
     title = {The monotonicity property for a quasilinear degenerate parabolic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1127--1136},
     year = {1990},
     volume = {26},
     number = {7},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_7_a3/}
}