Zabolotskii, N. V., & Mostova, M. R. (2014). Logarithmic Derivative and the Angular Density of Zeros for a Zero-Order Entire Function. Ukrains’kyi Matematychnyi Zhurnal, 66(4), 473–481. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/2149