@misc{NAM_1918_4_18__307_0,
     title = {Correspondance},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {307--309},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {4e s{\'e}rie, 18},
     year = {1918},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1918_4_18__307_0/}
}