HUY, Phan Trung; KHANG, Nguyễn Quý. Regular omega-languages and finite monoids having infinite products. Journal of Computer Science and Cybernetics, [S. l.], v. 19, n. 2, p. 180–186, 2012. DOI: 10.15625/1813-9663/19/2/1512. Disponível em: https://vjs.ac.vn/jcc/article/view/1512. Acesso em: 30 apr. 2025.