@article{RSMUP_1995__93__7_0,
     author = {Longobardi, Patrizia and Maj, Mercede and Stonehewer, Stewart},
     title = {The classification of groups in which every product of four elements can be reordered},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {7--26},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {93},
     year = {1995},
     mrnumber = {1354348},
     zbl = {0838.20038},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1995__93__7_0/}
}