@article{hy-cctbp-98 
, author =  "D. Halperin and C.-K. Yap" 
, title =   "Combinatorial complexity of translating a box in polyhedral $3$-space" 
, journal = "Comput. Geom. Theory Appl." 
, volume =  9 
, year =    1998 
, pages =   "181--196" 
, update =  "98.03 smid" 
}