Gol'dberg, A. A., and V. A. P'yana. “Uniqueness Theorems for Rational, Algebraic, and Algebroid Functions”. Ukrains’kyi Matematychnyi Zhurnal 46, no. 3 (March 25, 1994): 212–226. Accessed April 14, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/5757.