@techreport{EisenblaetterGroetschelKoster2000, author = {Andreas Eisenbl{\"a}tter and Martin Gr{\"o}tschel and Arie M.C.A. Koster}, title = {Frequency Planning and Ramifications of Coloring}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {00-47}, language = {eng}, year = {2000} }