Hân, Nguyễn Đình, Hồ Ngọc Vinh, Phạm Trung Huy, and Đỗ Long Vân. “An Algorithm for Testing Whether a Regular Language Is a Code”. Journal of Computer Science and Cybernetics 27, no. 1 (April 18, 2012): 1–8. Accessed November 4, 2025. https://jcc.vast.vn/jcc/article/view/457.