MOLCHANOV , I. N.; GALBA , E. F. Variational statements of a statical problem of the elasticity theory under the preset external forces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 43, n. 2, p. 158–161, 2025. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/9350. Acesso em: 6 dec. 2025.