Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1965__1_1_a2, author = {Havel, V\'aclav}, title = {Unessential {Zassenhaus} refinements}, journal = {Archivum mathematicum}, pages = {35--38}, publisher = {mathdoc}, volume = {01}, number = {1}, year = {1965}, mrnumber = {0194367}, zbl = {0188.04204}, language = {en}, url = {http://geodesic.mathdoc.fr/item/ARM_1965__1_1_a2/} }
Havel, Václav. Unessential Zassenhaus refinements. Archivum mathematicum, Tome 01 (1965) no. 1, pp. 35-38. http://geodesic.mathdoc.fr/item/ARM_1965__1_1_a2/