9FENG SHAOJI FENG DEXING Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China. E-mail: fengshaoji0164@sina.comAcademy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100080, China. E-mail: dxfeng@control.iss.ac.cn.NONLINEAR BOUNDARY STABILIZATION OF WAVE EQUATIONS WITH VARIABLE COEFFICIENTS[J].Chinese Annals of Mathematics,Series B,2003,24(2):239-248. 被引量:6