@article{NAM_1870_2_9__26_1, author = {Niewenglowski, B.}, title = {\'Etude sur la sph\`ere}, journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale}, pages = {26--30}, publisher = {Carilian-Goeury et Vor Dalmont}, volume = {2e s{\'e}rie, 9}, year = {1870}, language = {fr}, url = {http://archive.numdam.org/item/NAM_1870_2_9__26_1/} }