@phdthesis{ Dohmen:1993:CPG, author = {Klaus Dohmen}, title = {{Chromatische Polynome von Graphen und Hypergraphen}}, year = {1993}, month = {November}, type = {{Dissertation (PhD Thesis)}}, school = {Heinrich-Heine-Universität Düsseldorf}, keywords = {graph, hypergraph, chromatic polynomial, broken circuit, deletion-contraction, bounds} }