Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{FORUM_1994__6_3_141746, author = {Friedrich Hegenbarth and Alberto Cavicchioli}, title = {On 4-manifolds with free fundamental group.}, journal = {Forum mathematicum}, pages = {415--430}, publisher = {mathdoc}, volume = {6}, number = {3}, year = {1994}, zbl = {0822.57015}, url = {http://geodesic.mathdoc.fr/item/FORUM_1994__6_3_141746/} }
Friedrich Hegenbarth; Alberto Cavicchioli. On 4-manifolds with free fundamental group.. Forum mathematicum, Tome 6 (1994) no. 3, pp. 415-430. http://geodesic.mathdoc.fr/item/FORUM_1994__6_3_141746/