共 13 条
[3]
CHERKAS LA, 1970, DIFF EQUAT, V6, P891
[5]
HUANG XC, 1988, THESIS MARQUETTE U M
[7]
KUANG Y, 1988, Mathematical Biosciences, V88, P67, DOI 10.1016/0025-5564(88)90049-1
[8]
LIOU LP, 1987, UNIQUENESS LIMIT CYC
[9]
ROSENZWEIG ML, 1963, AM NAT, V47, P209
[10]
Southwood T. R. E., 1981, MATH THEORY DYNAMICS, VII, P31