@article{NAM_1863_2_2__339_1,
     author = {Griffiths, John},
     title = {Sur le cercle des neuf points},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {339--340},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {2e s{\'e}rie, 2},
     year = {1863},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1863_2_2__339_1/}
}