AISAGALIEV, S.; ZHUNUSSOVA, Z.; AKCA, H. Immersion principle for a variation calculus problem with boundary conditions. International Journal of Mathematics and Physics, [S. l.], v. 9, n. 2, p. 13–20, 2018. DOI: 10.26577/ijmph.2018.v9i2.260. Disponível em: https://ijmph.kaznu.kz/index.php/kaznu/article/view/260. Acesso em: 4 may. 2024.