中国科学院数学与系统科学研究院期刊网
Inverse Coefficient Problems for Nonlinear Elliptic Variational Inequalities
Run-sheng Yang, Yun-hua Ou
Acta Mathematicae Applicatae Sinica(English Series) . 2011, (1): 85 -92 .  DOI: 10.1007/s10255-011-0042-5