@article{GDZPPN00205700X,
title = {On the Ends of the Fundamental Groups of 3-Manifolds with Boundary.},
journal = {Commentarii mathematici Helvetici},
volume = {32},
year = {1957},
pages = {85-92},
zbl = {0080.16805},
url = {http://dml.mathdoc.fr/item/GDZPPN00205700X}
}
Papakyriakopoulos, C.D. On the Ends of the Fundamental Groups of 3-Manifolds with Boundary.. Commentarii mathematici Helvetici, Tome 32 (1957) pp. 85-92. http://gdmltest.u-ga.fr/item/GDZPPN00205700X/