@article{RSMUP_1972__48__1_0, author = {Wehrhahn, Karl H.}, title = {Projectivities in finite $p$-groups}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, volume = {48}, year = {1972}, pages = {1-13}, mrnumber = {360815}, zbl = {0355.20030}, language = {en}, url = {http://dml.mathdoc.fr/item/RSMUP_1972__48__1_0} }
Wehrhahn, Karl H. Projectivities in finite $p$-groups. Rendiconti del Seminario Matematico della Università di Padova, Tome 48 (1972) pp. 1-13. http://gdmltest.u-ga.fr/item/RSMUP_1972__48__1_0/
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