@article{DE_1988_24_7_a16,
     author = {L. A. Lepin},
     title = {Countable spectrum of the eigenfunctions of the nonlinear heat equation with distributed parameters},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1226--1234},
     publisher = {mathdoc},
     volume = {24},
     number = {7},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_7_a16/}
}