@article{DE_1993_29_3_a4,
     author = {E. M. Landis},
     title = {On the ``dead zone'' for semilinear degenerate elliptic inequalities},
     journal = {Differencialʹnye uravneni\^a},
     pages = {414--423},
     publisher = {mathdoc},
     volume = {29},
     number = {3},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1993_29_3_a4/}
}