@article{RSMUP_1963__33__285_0,
     author = {Busulini, Franca},
     title = {Sui gruppi non regolarmente ordinati},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {285--296},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {33},
     year = {1963},
     mrnumber = {158292},
     zbl = {0122.28001},
     language = {it},
     url = {http://archive.numdam.org/item/RSMUP_1963__33__285_0/}
}