Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1921__83_158859, author = {O. Perron}, title = {\"Uber diophantische {Approximationen}}, journal = {Mathematische Annalen}, pages = {77--84}, publisher = {mathdoc}, volume = {83}, year = {1921}, zbl = {48.0194.01}, url = {http://geodesic.mathdoc.fr/item/MAN_1921__83_158859/} }
O. Perron. Über diophantische Approximationen. Mathematische Annalen, Tome 83 (1921), pp. 77-84. http://geodesic.mathdoc.fr/item/MAN_1921__83_158859/