GIACAGLIA, G. E. O.; LAMAS, W. Q. On Euler-Lagrange’s Equations: A New Approach. Trends in Computational and Applied Mathematics, [S. l.], v. 21, n. 2, p. 359, 2020. DOI: 10.5540/tema.2020.021.02.359. Disponível em: https://tcam.sbmac.org.br/tema/article/view/1407. Acesso em: 3 jul. 2024.