Mulyava, O. M. “On the Relative Growth of Dirichlet Series With Zero Abscissa of Absolute Convergence”. Matematychni Studii 55, no. 1 (March 6, 2021): 44-50. Accessed December 8, 2021. http://matstud.org.ua/ojs/index.php/matstud/article/view/193.