@article{NAM_1919_4_19__220_0,
     author = {Ser, J.},
     title = {Groupes de points sur l'hyperbole \'equilat\`ere},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {220--228},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {4e s{\'e}rie, 19},
     year = {1919},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1919_4_19__220_0/}
}