@article{BAG_1988__27_138409,
     author = {J. Linhart},
     title = {\"Uber die {Varianz} der {Breite} von {Zonotopen}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {55--62},
     publisher = {mathdoc},
     volume = {27},
     year = {1988},
     zbl = {0678.52003},
     url = {http://geodesic.mathdoc.fr/item/BAG_1988__27_138409/}
}