共 27 条
[14]
MARINO R, 1987, 637 U TWENT DEP APPL
[15]
MOOG CH, 1982, SEP P C NAT BELL IL, P209
[16]
NIJMEIJER H, 1985, 502 TWENT U DEP MATH
[17]
RESPONDEK W, 1986, ALGEBR GEOM TOPOL, P257
[19]
SABERI A, 1987, P AM CONTR C
[20]
Tikhonov AN, 1985, DIFFERENTIAL EQUATIO