@article{MZM_1991_49_4_a4,
     author = {V. G. Zvyagin},
     title = {Number of solutions of the {Dirichlet} problem for equations elliptic on a set of solutions},
     journal = {Matemati\v{c}eskie zametki},
     pages = {47--54},
     publisher = {mathdoc},
     volume = {49},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1991_49_4_a4/}
}