@article{DE_1977_13_3_a12,
     author = {I. I. Matveeva},
     title = {The variational method for the solution of degenerate elliptic equations in a half-space},
     journal = {Differencialʹnye uravneni\^a},
     pages = {489--496},
     publisher = {mathdoc},
     volume = {13},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_3_a12/}
}