@article{DAN_1962_142_3_a0,
     author = {S. A. Gel'fer},
     title = {An extension of the {Goluzin{\textendash}Schiffer} variational method to multiply-connected regions},
     journal = {Doklady Akademii Nauk},
     pages = {503--506},
     year = {1962},
     volume = {142},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_3_a0/}
}