中国科学院数学与系统科学研究院期刊网
Local W~(2,p) Regularity for Some Elliptic Equations in Nondivergence Form
Yue Shan WANG
Acta Mathematica Sinica, Chinese Series . 2006, (3): 709 -720 .  DOI: 10.12386/A2006sxxb0090