@article{1029000032,
author = {Knapp, A. W.},
title = {Doubly generated Fuchsian groups.},
journal = {Michigan Math. J.},
volume = {15},
number = {1},
year = {1968},
pages = { 289-304},
language = {en},
url = {http://dml.mathdoc.fr/item/1029000032}
}
Knapp, A. W. Doubly generated Fuchsian groups.. Michigan Math. J., Tome 15 (1968) no. 1, pp. 289-304. http://gdmltest.u-ga.fr/item/1029000032/