@article{NAM_1896_3_15__232_1,
     author = {Autonne, L\'eon},
     title = {Sur une diff\'erentielle exacte},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {232--236},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {3e s{\'e}rie, 15},
     year = {1896},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1896_3_15__232_1/}
}