@article{NAM_1866_2_5__349_0,
     author = {Barbier, E.},
     title = {Formules de trigonom\'etrie sph\'erique},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {349--350},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {2e s{\'e}rie, 5},
     year = {1866},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1866_2_5__349_0/}
}