Zaionts, Yu., M. E. Korenkov, and Yu. I. Kharkevych. 2011. “Nevanlinna Characteristics and Defective Values of the Weierstrass Zeta Function”. Ukrains’kyi Matematychnyi Zhurnal 63 (5): 718-20. https://umj.imath.kiev.ua/index.php/umj/article/view/2757.