@article{TM_1979_150_a12,
     author = {S. M. Nikol'skii},
     title = {A~variational problem for an equation of elliptic type with degeneration on the boundary},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {212--238},
     publisher = {mathdoc},
     volume = {150},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_1979_150_a12/}
}