@article{BAG_1971__1_138071,
     author = {E. HERTEL},
     title = {\"Uber {Intervallpolyeder} im {Rn}},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {77--84},
     year = {1971},
     volume = {1},
     url = {http://geodesic.mathdoc.fr/item/BAG_1971__1_138071/}
}