Mulyava, O.M., and M.M. Sheremeta. “Belonging to Convergence Classes of Hadamard Compositions of Gelfond-Leont’ev Derivatives for Analytic Functions”. Carpathian Mathematical Publications 4, no. 1 (June 28, 2012): 111–115. Accessed April 28, 2024. https://journals.pnu.edu.ua/index.php/cmp/article/view/2471.