@article{DAN_1996_349_3_a6,
     author = {A. S. Sorokin},
     title = {M. {A.} {Lavrent'ev's} variational method and the {Hilbert} problem for multiply connected circular domains},
     journal = {Doklady Akademii Nauk},
     pages = {308--311},
     publisher = {mathdoc},
     volume = {349},
     number = {3},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1996_349_3_a6/}
}