CƯỜNG, B. C.; LONG, H. V.; PHONG, P. H. On the approximation of continous function by spline function hireachical fuzzy systems. Journal of Computer Science and Cybernetics, [S. l.], v. 25, n. 2, p. 99–108, 2012. DOI: 10.15625/1813-9663/25/2/563. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/563. Acesso em: 20 apr. 2024.