@article{1178240883,
author = {Sakan, Ken-ichi},
title = {Boundary groups of a Fuchsian group of the second kind},
journal = {Tohoku Math. J. (2)},
volume = {28},
number = {4},
year = {1976},
pages = { 99-104},
language = {en},
url = {http://dml.mathdoc.fr/item/1178240883}
}
Sakan, Ken-ichi. Boundary groups of a Fuchsian group of the second kind. Tohoku Math. J. (2), Tome 28 (1976) no. 4, pp. 99-104. http://gdmltest.u-ga.fr/item/1178240883/