R. Macaitienė, “Joint universality for $L$-functions from Selberg class and periodic Hurwitz zeta-functions”, Ukr. Mat. Zhurn., vol. 70, no. 5, pp. 655–671, May 2018, Accessed: Apr. 13, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/1585