BezkrylaS. I., NesterenkoA. N., and Chaikovs’kyiA. V. “On One Inequality for the Moduli of continuity of Fractional Order Generated by Semigroups of Operators”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 71, no. 3, Mar. 2019, pp. 310-24, http://umj.imath.kiev.ua/index.php/umj/article/view/1441.