MCLACHLAN, R. I.; OFFEN, C. Hamiltonian Boundary Value Problems, Conformal Symplectic Symmetries, and Conjugate Loci. New Zealand Journal of Mathematics, [S. l.], v. 48, p. 83–99, 2018. DOI: 10.53733/34. Disponível em: https://www.nzjmath.org/index.php/NZJMATH/article/view/34. Acesso em: 17 apr. 2024.