@article{GDZPPN002438917,
title = {Subgroup separability and 3-manifold groups.},
journal = {Mathematische Zeitschrift},
volume = {207},
year = {1991},
pages = {209-216},
zbl = {0711.57002},
url = {http://dml.mathdoc.fr/item/GDZPPN002438917}
}
Long, D.D.; Niblo, G.A. Subgroup separability and 3-manifold groups.. Mathematische Zeitschrift, Tome 207 (1991) pp. 209-216. http://gdmltest.u-ga.fr/item/GDZPPN002438917/