Andrzej P. Kisielewicz Krzysztof Przeslawski Polyboxes, Cube Tilings and Rigidity. 1-30 2008 40 Discrete & Computational Geometry 1 http://dx.doi.org/10.1007/s00454-007-9005-2 db/journals/dcg/dcg40.html#KisielewiczP08