Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1967__22_140836, author = {Esther Szekeres}, title = {Einfache {Beweise} zweier {Dreieckss\"atze.}}, journal = {Elemente der Mathematik}, pages = {17--18}, publisher = {mathdoc}, volume = {22}, year = {1967}, zbl = {0149.17801}, url = {http://geodesic.mathdoc.fr/item/ELMA_1967__22_140836/} }
Esther Szekeres. Einfache Beweise zweier Dreieckssätze.. Elemente der Mathematik, Tome 22 (1967), pp. 17-18. http://geodesic.mathdoc.fr/item/ELMA_1967__22_140836/