共 29 条
- [1] Aghalary R., 2005, Int. J. Math. Sci, V4, P267
- [2] Aouf M.K., 2008, J. Math. Inequal, V2, P537, DOI [10.7153/jmi-02-48, DOI 10.7153/JMI-02-48]
- [5] Hohlov Y.E., 1978, Izv. Vyssh. Uchebn. Zaved. Mat., V10, P83
- [9] Lin LJ., 1998, GEORGIAN MATH J, V5, P361
- [10] Loriana A., 2013, ADV DIFFER EQU, V2013