TAO, N. Q. Extracting invariants based on coordinate transformations. Journal of Computer Science and Cybernetics, [S. l.], v. 9, n. 4, p. 28–32, 2016. DOI: 10.15625/1813-9663/9/4/8255. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/8255. Acesso em: 3 may. 2024.