@article{DE_1978_14_2_a8,
     author = {G. V. Zhidkov},
     title = {The solvability of a variational problem for a certain class of functions in an axially symmetric domain},
     journal = {Differencialʹnye uravneni\^a},
     pages = {274--280},
     publisher = {mathdoc},
     volume = {14},
     number = {2},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1978_14_2_a8/}
}