共 38 条
[15]
Franco D, 2003, MATH INEQUAL APPL, V6, P477
[16]
Jankowski T, 2004, COMPUT MATH APPL, V47, P1419, DOI 10.1016/j.camwa.2004.04.025
[17]
Jankowski T, 2007, INDIAN J PURE AP MAT, V38, P203
[18]
Laksmikantham V., 1989, SERIES MODERN APPL M, V6
[19]
LI J, 2005, NONLINEAR STUDIES, V12, P391