@article{ELMA_1973__28_141121,
     author = {Wolfgang B\"ohm},
     title = {Das {Tanzkursproblem.}},
     journal = {Elemente der Mathematik},
     pages = {121--129},
     year = {1973},
     volume = {28},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1973__28_141121/}
}