共 28 条
[3]
Benci V., 1998, Topol. Methods Nonlinear Anal, V11, P283, DOI [10.12775/TMNA.1998.019, DOI 10.12775/TMNA.1998.019]
[4]
Brown KJ, 2007, ELECTRON J DIFFER EQ
[5]
Brown KJ, 2009, DIFFER INTEGRAL EQU, V22, P1097