A new lower bound for the frequency assignment problem. - Dong-wan Tcha; Yong-joo Chung; Taek-Jin Choi (IEEE/ACM Trans. Netw., 1997)

Perturbation-minimizing frequency assignment in a changing TDMA/FDMA cellular environment. - Dong-Wan Tcha; June-Hyuk Kwon; Taek-Jin Choi; Se-Hyun Oh (IEEE Trans. Veh. Technol., 2000)