Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1985__26_2_a2, author = {T\r{u}ma, Ji\v{r}{\'\i}}, title = {A simple geometric proof of a theorem on $M_n$}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {233--239}, publisher = {mathdoc}, volume = {26}, number = {2}, year = {1985}, mrnumber = {803919}, zbl = {0567.08001}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1985__26_2_a2/} }
Tůma, Jiří. A simple geometric proof of a theorem on $M_n$. Commentationes Mathematicae Universitatis Carolinae, Tome 26 (1985) no. 2, pp. 233-239. http://geodesic.mathdoc.fr/item/CMUC_1985__26_2_a2/