SOLUTION TO THE CATENARY PROBLEM BY APPLYING THE FUNDAMENTAL LEMMA OF VARIATIONAL CALCULUS. Balkan Journal of Applied Mathematics and Informatics, [S. l.], v. 7, n. 1, p. 63–70, 2024. Disponível em: https://js.ugd.edu.mk/index.php/bjami/article/view/6479. Acesso em: 3 oct. 2025.