Chi Wan Sung Kenneth W. Shum Kin Kwong Leung Stability of distributed power and signature sequence control for CDMA Systems-a game-theoretic framework. 1775-1780 2006 52 IEEE Trans. Inf. Theory 4 https://doi.org/10.1109/TIT.2006.871583 db/journals/tit/tit52.html#SungSL06