Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MS2_1986__58_166969, author = {B.G. Seifert}, title = {Classification of fibred group extensions and {H...}}, journal = {Mathematica Scandinavica}, pages = {105--113}, publisher = {mathdoc}, volume = {58}, year = {1986}, zbl = {0579.20052}, url = {http://geodesic.mathdoc.fr/item/MS2_1986__58_166969/} }
B.G. Seifert. Classification of fibred group extensions and H.... Mathematica Scandinavica, Tome 58 (1986), pp. 105-113. http://geodesic.mathdoc.fr/item/MS2_1986__58_166969/