@article{DE_1988_24_4_a13,
     author = {L. I. Kamynin},
     title = {A theorem on an oblique derivative for second-order parabolic equations that admit weak {degeneration.~I}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {650--661},
     publisher = {mathdoc},
     volume = {24},
     number = {4},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_4_a13/}
}