ỔN, Phùng Văn. on the complexity of recognition of regular layer languages generating by extended hyper generating-schemas. <b>Journal of Computer Science and Cybernetics</b>, <i>[S. l.]</i>, v. 20, n. 2, p. 176–182, 2012. DOI: 10.15625/1813-9663/20/2/1474. Disponível em: https://jcc.vast.vn/jcc/article/view/1474. Acesso em: 4 nov. 2025.