@article{10_4171_dm_128,
     author = {Joseph Gubeladze and Winfried Bruns},
     title = {Unimodular covers of multiples of polytopes},
     journal = {Documenta mathematica},
     pages = {463--480},
     year = {2002},
     volume = {7},
     doi = {10.4171/dm/128},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/128/}
}