@article{NAM_1916_4_16__401_0,
     author = {Goormaghtigh, R.},
     title = {Sur certains syst\`emes d'\'equations ind\'etermin\'ees du second degr\'e},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {401--426},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {4e s{\'e}rie, 16},
     year = {1916},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1916_4_16__401_0/}
}