@article{CMH_1934__7_138639,
     author = {S. Bays and E. de de Weck},
     title = {Sur les syst\`emes de quadruples.},
     journal = {Commentarii mathematici Helvetici},
     pages = {222--242},
     year = {1934},
     volume = {7},
     url = {http://geodesic.mathdoc.fr/item/CMH_1934__7_138639/}
}