@article{NAM_1861_1_20__72_0,
     author = {Kummer, E.-E.},
     title = {Th\'eorie g\'en\'erale des syst\`emes de rayons rectilignes},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {72--76},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 20},
     year = {1861},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1861_1_20__72_0/}
}