... Journal of Inequalities and ApplicationsReferences1 R. P. Agarwal, Difference Equations and Inequalities: Theory, Methods and Applications, vol. 155 ofMonographs and Textbooks in Pure and Applied ... differential equations and their discrete analogues,”Pan-American Mathematical Journal, vol. 9, no. 4, pp. 55–67, 1999.7 B. G. Pachpatte, “On the discrete generalizations of Gronwall’s inequality,” ... North-Holland Mathematics Studies, North-Holland, Amsterdam, The Netherlands, 1985.16 S. Piskarev and S Y. Shaw, “On certain operator families related to cosine operator functions,”Taiwanese Journal...