@article{BorndoerferEisenblaetterGroetscheletal.1998, author = {Ralf Bornd{\"o}rfer and Andreas Eisenbl{\"a}tter and Martin Gr{\"o}tschel and Alexander Martin}, title = {Frequency assignment in cellular phone networks}, journal = {Annals of Operations Research}, volume = {76}, pages = {73 -- 93}, doi = {10.1023/A:1018908907763}, year = {1998}, }