共 12 条
[1]
Agarwal R.P., 1997, Advanced Topics in Difference Equations, DOI 10.1007/978-94-015-8899-7
[2]
Agarwal R.P., 1998, FOCAL BOUNDARY VALUE
[5]
AGARWAL RP, IN PRESS POSITIVE SO
[6]
AGARWAL RP, 1997, NONLINEAR WORLD, V4, P101
[7]
Agarwal RP, 1992, Difference equations and inequalities
[8]
HARTMAN P, 1978, T AM MATH SOC, V246, P1
[9]
Lasota A., 1968, Ann. Pol. Math, V20, P183, DOI [10.4064/ap-20-2-183-190, DOI 10.4064/AP-20-2-183-190]
[10]
O'Regan D., 1997, Existence Theory for nonlinear ordinary differential equations