DAMBRAUSKAS, A.; RINKEVIČIUS, V. Algorithmic Methods of Variational Calculus. Elektronika ir Elektrotechnika, [S. l.], v. 85, n. 5, p. 25-28, 2008. Disponível em: https://eejournal.ktu.lt/index.php/elt/article/view/11154. Acesso em: 21 may. 2024.