@article{DE_1984_20_3_a14,
     author = {V. S. Klimov},
     title = {Lower bounds for the number of solutions of some boundary value problems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {481--489},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_3_a14/}
}