共 9 条
[1]
Bainov D. D., 1989, SYSTEMS IMPULSIVE EF
[2]
CHOW SN, 1974, J DIFFER EQUATIONS, V15, P308, DOI 10.1016/0022-0396(74)90082-5
[3]
DISHLIEV AB, 1985, APPL ANAL, V18, P67
[5]
Kulev G, 1988, APPL ANAL, V26, P255, DOI [10.1080/00036818808839713, DOI 10.1080/00036818808839713]
[8]
Lakshmikantham V., 1989, WORLD SCI
[9]
Samoilenko AM., 1987, DIFF EQUAT+