Nariezhnii, O., E. Eremin, V. Frolenko, K. Chernov, T. Kuznetsova, and Y. Demenko. “Statistical Properties of Modern Stream Ciphers”. Computer Science and Cybersecurity, no. 3, Dec. 2018, pp. 38-47, https://periodicals.karazin.ua/cscs/article/view/12151.