@article{GDZPPN00206958X,
title = {A Kleinian group with contractible quotient not simply connected at infinity.},
journal = {Commentarii mathematici Helvetici},
volume = {71},
year = {1996},
pages = {41-59},
zbl = {0860.57009},
url = {http://dml.mathdoc.fr/item/GDZPPN00206958X}
}
Cooper, Daryl; Long, Darren. A Kleinian group with contractible quotient not simply connected at infinity.. Commentarii mathematici Helvetici, Tome 71 (1996) pp. 41-59. http://gdmltest.u-ga.fr/item/GDZPPN00206958X/