@article{GDZPPN002341905, title = {On the fundamental groups of some open rational surfaces.}, journal = {Mathematische Annalen}, volume = {305}, year = {1996}, pages = {15-30}, zbl = {0853.14010}, url = {http://dml.mathdoc.fr/item/GDZPPN002341905} }
Gurjar, R.V.; Zhang, D.-Q. On the fundamental groups of some open rational surfaces.. Mathematische Annalen, Tome 305 (1996) pp. 15-30. http://gdmltest.u-ga.fr/item/GDZPPN002341905/