Bandura, A. I., T. M. Salo, and O. B. Skaskiv. “Composition of Entire Function and Analytic Functions in the Unit Ball With a Vanished Gradient”. Matematychni Studii 62, no. 2 (December 13, 2024): 132-140. Accessed January 2, 2025. http://matstud.org.ua/ojs/index.php/matstud/article/view/578.