Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{ELMA_1970__25_140978, author = {E. Heil}, title = {Affine {Scheitel} von {Ovalen.}}, journal = {Elemente der Mathematik}, pages = {84--85}, publisher = {mathdoc}, volume = {25}, year = {1970}, zbl = {0175.48201}, url = {http://geodesic.mathdoc.fr/item/ELMA_1970__25_140978/} }
E. Heil. Affine Scheitel von Ovalen.. Elemente der Mathematik, Tome 25 (1970), pp. 84-85. http://geodesic.mathdoc.fr/item/ELMA_1970__25_140978/