@article{1138845498,
author = {Niino, Kiyoshi},
title = {On finite modifications of two- or three-sheeted covering open Riemann surfaces},
journal = {Kodai Math. Sem. Rep.},
volume = {19},
number = {1},
year = {1967},
pages = { 415-424},
language = {en},
url = {http://dml.mathdoc.fr/item/1138845498}
}
Niino, Kiyoshi. On finite modifications of two- or three-sheeted covering open Riemann surfaces. Kodai Math. Sem. Rep., Tome 19 (1967) no. 1, pp. 415-424. http://gdmltest.u-ga.fr/item/1138845498/