共 23 条
[2]
[Anonymous], 1976, LECT NOTES MATH
[3]
[Anonymous], J DIFFERENTIAL EQUAT
[4]
[Anonymous], SPRINGER MONOGR MATH
[5]
Bachar I., 2008, NONLINEAR STUD, V15, P177
[6]
Ben Othman S., 2013, J MATH, DOI [10.1155/2013/409329, DOI 10.1155/2013/409329]
[8]
Calzolari E, 2006, DISCRETE CONT DYN-A, V15, P447