@article{NAM_1892_3_11__302_1,
     author = {Lef\`evre, J.},
     title = {La sym\'etrie en coordonn\'ees polaires},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {302--314},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {3e s{\'e}rie, 11},
     year = {1892},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1892_3_11__302_1/}
}