@article{MZ_1921__11_167658,
     author = {H. Happel},
     title = {\"Uber das {Gleichgewicht} von elliptischen {Platten}},
     journal = {Mathematische Zeitschrift},
     pages = {194--223},
     publisher = {mathdoc},
     volume = {11},
     year = {1921},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1921__11_167658/}
}