@article{RSMUP_1958__28__68_0,
     author = {Busulini, Bruno},
     title = {Sulla relazione triangolare in un $l$-gruppo},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {68--70},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {28},
     year = {1958},
     mrnumber = {97449},
     zbl = {0085.25603},
     language = {it},
     url = {http://www.numdam.org/item/RSMUP_1958__28__68_0/}
}