@article{EisenblaetterGroetschelKoster2002, author = {Andreas Eisenbl{\"a}tter and Martin Gr{\"o}tschel and Arie M.C.A. Koster}, title = {Frequency Planning and Ramifications of Coloring}, journal = {Discussiones Mathematicae, Graph Theory}, number = {22}, pages = {51 -- 88}, year = {2002}, }