%0 Journal Article %A Longobardi, Patrizia %A Maj, Mercede %A Stonehewer, Stewart %T The classification of groups in which every product of four elements can be reordered %J Rendiconti del Seminario Matematico della Università di Padova %D 1995 %P 7-26 %V 93 %I Seminario Matematico of the University of Padua %U http://www.numdam.org/item/RSMUP_1995__93__7_0/ %G en %F RSMUP_1995__93__7_0