@article{DE_1969_5_8_a18,
     author = {V. G. Klimenko},
     title = {Taking into account the symmetry in the solution of boundary value problems by variational methods},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1517--1522},
     publisher = {mathdoc},
     volume = {5},
     number = {8},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_8_a18/}
}