@article{FAA_2010_44_1_a3,
     author = {S. M. Natanzon},
     title = {Simple {Hurwitz} {Numbers} of a {Disk}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {44--58},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2010_44_1_a3/}
}