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@article{MZ_1971__123_171630, author = {Hans Zassenhaus and Charles E. Johnson}, title = {On {Equivalence} of {Finite} {Group} {Extensions.}}, journal = {Mathematische Zeitschrift}, pages = {191--200}, publisher = {mathdoc}, volume = {123}, year = {1971}, zbl = {0224.20023}, url = {http://geodesic.mathdoc.fr/item/MZ_1971__123_171630/} }
Hans Zassenhaus; Charles E. Johnson. On Equivalence of Finite Group Extensions.. Mathematische Zeitschrift, Tome 123 (1971), pp. 191-200. http://geodesic.mathdoc.fr/item/MZ_1971__123_171630/