@article{DE_1974_10_8_a20,
     author = {Yu. Sh. Abramov},
     title = {Elliptic operators that depend nonlinearly on a parameter},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1525--1526},
     publisher = {mathdoc},
     volume = {10},
     number = {8},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1974_10_8_a20/}
}