[1] Wei L, He Z. The applications of sums of ranges of accretive operators to nonlinear equations involving the p-Laplacian operator. Nonlinear Anal, 1995, 24: 185--193

[2] Wei L, He Z. The applications of theories of accretive operators to nonlinear elliptic boundary value problems in L^p-spaces. Nonlinear Anal, 2001,  46: 199--211

[3]  魏利. 与广义p-Laplace算子相关的非线性边值问题在L^s(Ω)空间中解的存在性. 数学物理学报, 2010, 30A: 1111--1116

[4] Wei L, Zhou H Y. Research on the existence of solution of equation involving p-Laplacian operator. Applied Mathematics A J Chinese Univ (Ser B), 2006, 21: 191--202

[5] Wei L, Zhou H Y. Existence of solutions of a family of nonlinear boundary value problems L²-spaces. Applied Mathematics A J Chinese Univ (Ser B), 2005, 20: 175--182

[6] 魏利, 段丽凌. 非线性边值问题在$L^p$空间中解的存在性的进一步研究. 数学的实践与认识,  2009, 39(6): 187--193

[7] Wei L, Zhou H Y, Agarwal R P. Existence of solutions for nonlinear Neumann boundary value problems.
J Math Resear Exposi, 2010,  30(1): 99--109

[8] Calvert B D, Gupta C P. Nonlinear elliptic boundary value problems in L^p-spaces and sums of ranges of accretive operators. Nonlinear Anal, 1978, 2: 1--26

[9] Brezis H. Equations et inequalitions nonlinearies dans les espaces vectoriels an dualite. Ann Inst Fourier Grenoble, 1968, 18(1): 115--175

[10] Reich S. The range of sums of accretive and monotone operators. J Math Anal Appli, 1979, 68: 310--317

[11] Pascali D, Sburlan S. Nonlinear Mappings of Monotone Type. Netherlands: Sijthoff, Noordhoff, 1978

[12] Barbu V. Nonlinear Semigroups and Differential Equations in Banach Spaces. Netherlands: Noordhoff, Leyden, 1976

[13] Adams R A. The Sobolev Space (Version of Chinese Translation). Beijing: People's Education Press, 1981

[14] 李立康, 郭毓陶. 索伯列夫空间引论. 上海: 上海科技出版社, 1981