Krasniqi, Valmir, Mansour, Toufik, Shabani, Armend Sh. (2010) Some inequalities for q-polygamma function and ζq-Riemann zeta functions Annales Mathematicae et Informaticae. 37. pp. 95-100. ISSN 1787-5021 (Print), 1787-6117 (Online)