KALANTA, Stanislovas. Relations and transformations of extremum energy principles for deformable body. Journal of Civil Engineering and Management, [S. l.], v. 3, n. 9, p. 49–56, 1997. DOI: 10.3846/13921525.1997.10531671. Disponível em: https://journals.vilniustech.lt/index.php/JCEM/article/view/9498. Acesso em: 1 jul. 2025.