Towards a realistic upper bound for the number of facets of 3-dimensional dirichlet stereohedr. - Daciana Bochis; Francisco Santos (CCCG, 1998)

On the Number of Facets of Three-Dimensional Dirichlet Stereohedra I: Groups with Reflections. - Daciana Bochis; Francisco Santos (Discret. Comput. Geom., 2001)