@article{NAM_1856_1_15__165_0,
     author = {Br\"unnow},
     title = {Sur les quatre syst\`emes de coordonn\'ees astronomiques},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {165--171},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 15},
     year = {1856},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1856_1_15__165_0/}
}