@article{DE_1999_35_8_a10,
     author = {M. E. Lerner and O. A. Repin},
     title = {On {Frankl'-type} problems for some elliptic equations with degeneration of various types},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1087--1093},
     publisher = {mathdoc},
     volume = {35},
     number = {8},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1999_35_8_a10/}
}