Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1968__23_140885, author = {K. Kopfermann}, title = {\"Uber {Dreiecke.}}, journal = {Elemente der Mathematik}, pages = {49--60}, publisher = {mathdoc}, volume = {23}, year = {1968}, language = {de}, url = {http://geodesic.mathdoc.fr/item/ELMA_1968__23_140885/} }
K. Kopfermann. Über Dreiecke.. Elemente der Mathematik, Tome 23 (1968), pp. 49-60. http://geodesic.mathdoc.fr/item/ELMA_1968__23_140885/