The indices of torsion-free subgroups of Fuchsian groups
1983 ◽
Vol 89
(3)
◽
pp. 414-414
2009 ◽
Vol 13
(2A)
◽
pp. 441-457
◽
1982 ◽
Vol 6
(3)
◽
pp. 456-459
◽
1997 ◽
Vol 39
(2)
◽
pp. 221-225
◽
2002 ◽
Vol 12
(01n02)
◽
pp. 223-246
◽
1984 ◽
Vol 282
(1)
◽
pp. 205-205
◽