Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1958__13_140686, author = {F. Leuenberger}, title = {Einige {Dreiecksungleichungen.}}, journal = {Elemente der Mathematik}, pages = {121--126}, publisher = {mathdoc}, volume = {13}, year = {1958}, language = {de}, url = {http://geodesic.mathdoc.fr/item/ELMA_1958__13_140686/} }
F. Leuenberger. Einige Dreiecksungleichungen.. Elemente der Mathematik, Tome 13 (1958), pp. 121-126. http://geodesic.mathdoc.fr/item/ELMA_1958__13_140686/