共 14 条
[1]
Agarwal RP, 1992, Difference equations and inequalities
[2]
[Anonymous], 1994, APPL ANAL, DOI DOI 10.1080/00036819408840248
[3]
[Anonymous], C MATH
[4]
[Anonymous], PANAMERICAN MATH J
[5]
Erbe L., 1989, DIFFERENTIAL INTEGRA, V2, P300
[6]
Gy??ri I., 1991, OSCILLATION THEORY D
[7]
LADDE GS, 1987, OSCILLATION THEORY D
[8]
SHEN JH, 1996, CHINESE SCI BULL, V41, P1441