@article{DCG_1991__6_4_131141,
     author = {M.M. Bayer and A. Klapper},
     title = {A {New} {Index} for {Polytopes.}},
     journal = {Discrete & computational geometry},
     pages = {33--48},
     publisher = {mathdoc},
     volume = {6},
     number = {4},
     year = {1991},
     zbl = {0761.52009},
     url = {http://geodesic.mathdoc.fr/item/DCG_1991__6_4_131141/}
}