@article{MOMA_1981__91_178009,
     author = {Klaus Meirer},
     title = {Die windschiefen {Fl\"achen} mit einer stetigen {Schar} ebener {Schattengrenzen} {I.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {39--72},
     publisher = {mathdoc},
     volume = {91},
     year = {1981},
     zbl = {0447.53009},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1981__91_178009/}
}