ANGRIAWAN , P. M. . Repository System Development using Partial Differential Equations . Mathematical Statistician and Engineering Applications, [S. l.], v. 71, n. 1, p. 118 –, 2022. DOI: 10.17762/msea.v71i1.52. Disponível em: https://philstat.org/index.php/MSEA/article/view/52. Acesso em: 3 jul. 2024.