@article{DAN_1963_152_1_a0,
     author = {L. A. Aksent'ev},
     title = {Indices of functions on {Riemann} surfaces},
     journal = {Doklady Akademii Nauk},
     pages = {9--12},
     publisher = {mathdoc},
     volume = {152},
     number = {1},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_152_1_a0/}
}