@article{DE_1989_25_8_a7,
     author = {S. A. Terziyan},
     title = {A variational approach to nonresonance problems for semilinear equations in a {Hilbert} space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1344--1349},
     publisher = {mathdoc},
     volume = {25},
     number = {8},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_8_a7/}
}