@article{NAM_1915_4_15__440_0,
     author = {Joffroy, Joseph},
     title = {Nouveau th\'eor\`eme relatif \`a des circonf\'erences tangentes},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {440--446},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {4e s{\'e}rie, 15},
     year = {1915},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1915_4_15__440_0/}
}