@article{AndrzejakWelzl2003, author = {Andrzejak, Artur and Welzl, Emo}, title = {In between k-Sets, j-Facets, and i-Faces: (i , j) - Partition}, volume = {29}, journal = {Discrete \& Computational Geometry}, number = {1}, doi = {s00454-002-2778-4}, pages = {105 -- 131}, year = {2003}, language = {en} }