@article{RSMUP_1958__28__107_0, author = {Frigerio, Alberto}, title = {Sui quasi gruppi associati ai gruppi}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, pages = {107--111}, publisher = {Seminario Matematico of the University of Padua}, volume = {28}, year = {1958}, mrnumber = {99375}, zbl = {0082.24701}, language = {it}, url = {http://www.numdam.org/item/RSMUP_1958__28__107_0/} }