@article{10_21136_AM_1984_104087,
     author = {Pottmann, Helmut},
     title = {Spezielle \"aquiforme {Zwangl\"aufe}},
     journal = {Applications of Mathematics},
     pages = {225--232},
     year = {1984},
     volume = {29},
     number = {3},
     doi = {10.21136/AM.1984.104087},
     mrnumber = {0747214},
     zbl = {0553.53005},
     language = {de},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1984.104087/}
}