@article{GDZPPN002268027, title = {Ein Minimumproblem f\"ur Ovale}, journal = {Mathematische Annalen}, volume = {84}, year = {1921}, pages = {311-320}, zbl = {48.0838.02}, url = {http://dml.mathdoc.fr/item/GDZPPN002268027} }
Pál, J. Ein Minimumproblem für Ovale. Mathematische Annalen, Tome 84 (1921) pp. 311-320. http://gdmltest.u-ga.fr/item/GDZPPN002268027/