@article{NAM_1907_4_7__115_1, author = {Haag, J.}, title = {\'Etude du tore rapport\'e aux cercles {d'Yvon} {Villarceau}}, journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale}, pages = {115--130}, publisher = {Carilian-Goeury et Vor Dalmont}, volume = {4e s{\'e}rie, 7}, year = {1907}, language = {fr}, url = {http://archive.numdam.org/item/NAM_1907_4_7__115_1/} }