Xiao Jianhua. Determining Stress and Effective Elastic Parameters for Spherical Contact Problems I: Static Contact[EB/OL]. Beijing:Sciencepaper Online[2008-03-11]. http://www.paper.edu.cn/releasepaper/content/200803-237. 此文件来自 中国科技论文在线 请勿作用于商业用途!