@article{GDZPPN002438313,
title = {Subnormal subgroups of 3-dimensional Poincar\'e duality groups.},
journal = {Mathematische Zeitschrift},
volume = {207},
year = {1991},
pages = {67-70},
zbl = {0695.57001},
url = {http://dml.mathdoc.fr/item/GDZPPN002438313}
}
Bieri, R.; Hillmann, J.A. Subnormal subgroups of 3-dimensional Poincaré duality groups.. Mathematische Zeitschrift, Tome 207 (1991) pp. 67-70. http://gdmltest.u-ga.fr/item/GDZPPN002438313/