@article{ELMA_1978__33_141221,
     author = {Ludwig Stammler},
     title = {Der {Kreis} mit minimaler {Fl\"achendifferenz} zum {Dreieck.}},
     journal = {Elemente der Mathematik},
     pages = {143--152},
     publisher = {mathdoc},
     volume = {33},
     year = {1978},
     zbl = {0417.51007},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1978__33_141221/}
}