GENERALIZATION OF APPLICATION OF FUNDAMENTAL LEMMA OF VARIATIONAL CALCULUS. Balkan Journal of Applied Mathematics and Informatics, [S. l.], v. 8, n. 1, p. 19–26, 2025. Disponível em: https://js.ugd.edu.mk/index.php/bjami/article/view/7135. Acesso em: 3 oct. 2025.