@article{DAN_1968_178_4_a0,
     author = {A. N. Berlinskii},
     title = {The number of elliptic regions adjoining a singular point},
     journal = {Doklady Akademii Nauk},
     pages = {759--762},
     publisher = {mathdoc},
     volume = {178},
     number = {4},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_178_4_a0/}
}