Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MZ_1967__102_170881, author = {K.W. Gruenberg}, title = {A {New} {Treatment} of {Group} {Extensions.}}, journal = {Mathematische Zeitschrift}, pages = {340--350}, publisher = {mathdoc}, volume = {102}, year = {1967}, zbl = {0178.01704}, url = {http://geodesic.mathdoc.fr/item/MZ_1967__102_170881/} }
K.W. Gruenberg. A New Treatment of Group Extensions.. Mathematische Zeitschrift, Tome 102 (1967), pp. 340-350. http://geodesic.mathdoc.fr/item/MZ_1967__102_170881/