共 9 条
[2]
ERBE LH, 1975, ANN POLON MATH, V31, P131
[3]
Hartman P., 2010, CLASSICS APPL MATH, V38
[4]
Liapounoff A, 1907, ANN FS U TOULOUSE, V9, P203, DOI DOI 10.5802/AFST.246
[5]
LOS GP, 1967, DIFFERENTSIALNYE URA, V3, P1707
[6]
Magnus W., 1966, HILLS EQUATION
[7]
MOORE RA, 1956, J ANAL MATH, V5, P183
[8]
Opial Z., 1959, ANN POL MATH, V6, P87
[9]
TONKOV EL, 1969, DIFFERENTIAL EQUATIO, V5, P1484