共 9 条
[1]
COPPEL WA, 1971, LECTURE NOTES MATH
[5]
Levin, 1969, USP MAT NAUK, V146, P43
[6]
Levin A.Y., 1969, RUSSIAN MATH SURVEYS, V24, P43, DOI DOI 10.1070/RM1969V024N02ABEH001342
[8]
ASYMPTOTIC BEHAVIOUR OF DISCONJUGATE NTH ORDER DIFFERENTIAL EQUATIONS
[J].
CANADIAN JOURNAL OF MATHEMATICS,
1971, 23 (02)
:293-&
[9]
WILLETT D, 1971, SIAM J MATH ANAL, V2, P536