SAH, N. P. Derivative use of matrix. BIBECHANA, [S. l.], v. 4, p. 10–12, 2018. DOI: 10.3126/bibechana.v4i0.19214. Disponível em: https://www.nepjol.info/index.php/BIBECHANA/article/view/19214. Acesso em: 18 may. 2024.