@article{2294, author = {Hadwiger, H.}, title = {Ueber Eibereiche mit gemeinsamer Treffgeraden}, journal = {Portugaliae mathematica}, volume = {16}, year = {1957}, pages = {23-29}, zbl = {0081.16404}, mrnumber = {0099015}, language = {de}, url = {http://dml.mathdoc.fr/item/2294} }
Hadwiger, H. Ueber Eibereiche mit gemeinsamer Treffgeraden. Portugaliae mathematica, Tome 16 (1957) pp. 23-29. http://gdmltest.u-ga.fr/item/2294/