@article{GDZPPN00205616X, title = {Generalization of a geometrical theorem of Euler.}, journal = {Commentarii mathematici Helvetici}, volume = {27}, year = {1953}, pages = {233-234}, zbl = {0050.37705}, url = {http://dml.mathdoc.fr/item/GDZPPN00205616X} }
Truesdell, C. Generalization of a geometrical theorem of Euler.. Commentarii mathematici Helvetici, Tome 27 (1953) pp. 233-234. http://gdmltest.u-ga.fr/item/GDZPPN00205616X/