VASILEVA, N.; LILOV, L. A TENSORIAL FORM OF LAGRANGE’S EQUATIONS. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 82, n. 2, p. 249–286, 1991. Disponível em: https://ftl5.uni-sofia.bg/index.php/fmi/article/view/546. Acesso em: 5 dec. 2024.