@article{NAM_1876_2_15__501_1,
     author = {Lucas, \'Edouard},
     title = {Questions de g\'eom\'etrie tricirculaire et t\'etrasph\'erique},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {501--503},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {2e s{\'e}rie, 15},
     year = {1876},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1876_2_15__501_1/}
}