C.-M. M. Chung, V. Hwang, M. J. Kannwischer, G. Seiler, C.-J. . Shih, and B.-Y. . Yang, “NTT Multiplication for NTT-unfriendly Rings: New Speed Records for Saber and NTRU on Cortex-M4 and AVX2”, TCHES, vol. 2021, no. 2, pp. 159–188, Feb. 2021.