共 12 条
[1]
AMSTER P, IN PRESS NODEA NONLI
[3]
Franco D, 2003, DISCRETE CONT DYN-A, P273
[5]
LANDESMAN EM, 1970, J MATH MECH, V19, P609
[8]
Mawhin J., 2000, B SOC ESPANOLA MATEM, V16, P45
[9]
MAWHIN J, 1979, NSF CBMS REG C MATH, V40
[10]
Nagumo M., 1937, Proc. Phys.Math. Soc. Japan, V19, P861, DOI 10.11429/ppmsj1919.19.0861