Kačėnas , Audrius, Antanas Laurinčika, and Kohji Matsumoto. “On the Universality of Dirichlet Series of Holomorphic Cusp Forms”. Lietuvos matematikos rinkinys 38, no. II (December 14, 1998): 29–34 . Accessed April 19, 2025. https://journals.vu.lt./LMR/article/view/37690.