[1] AGARWAL, R. P.: Difference Equations and Inequalities: Theory, Methods, and Applications (2nd ed.), Pure Appl. Math., Vol. 228, Marcel Dekker, New York, 2000.10.1201/9781420027020
[10] ERBE, L. H.-KONG, L.-KONG, Q.: A telescoping principle for oscillation of second order differential equations on time scale, Rocky Mountain J. Math. 36 (2006), 149-181.10.1216/rmjm/1181069493
[13] KWONG, M. K.-ZETTL, A.: Integral inequalities and second order linear oscillation, J. Differential Equations 45 (1982), 16-23.10.1016/0022-0396(82)90052-3
[14] ˇREH´AK, P.: Oscillation criteria for second order half-linear difference equations, J. Difference Equ. Appl. 7 (2001), 483-505.10.1080/10236190108808284