Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1941__2_1_114576, author = {Sarmento de Beires, R.}, title = {Sur la formule {d'Euler-Savary}}, journal = {Portugaliae mathematica}, pages = {81--84}, publisher = {mathdoc}, volume = {2}, number = {1}, year = {1941}, mrnumber = {0003932}, zbl = {0025.21803}, language = {fr}, url = {http://geodesic.mathdoc.fr/item/PORMA_1941__2_1_114576/} }
Sarmento de Beires, R. Sur la formule d'Euler-Savary. Portugaliae mathematica, Tome 2 (1941) no. 1, pp. 81-84. http://geodesic.mathdoc.fr/item/PORMA_1941__2_1_114576/