@article{JRAM_1983__338_152499,
     author = {Werner Georg Nowak},
     title = {Ein nicht-konvexes {Analogon} zum mehrdimensionalen {Kugelproblem.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {149--165},
     publisher = {mathdoc},
     volume = {338},
     year = {1983},
     zbl = {0489.10049},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1983__338_152499/}
}