@article{MAN_1907__64_158333,
     author = {Gino Loria},
     title = {Sopra certi inviluppi di, cerchi},
     journal = {Mathematische Annalen},
     pages = {512--516},
     publisher = {mathdoc},
     volume = {64},
     year = {1907},
     zbl = {38.0627.03},
     url = {http://geodesic.mathdoc.fr/item/MAN_1907__64_158333/}
}