A Study of Variational Principles: Features and Application: Applications of variational concepts in various fields. Journal of Advances and Scholarly Researches in Allied Education, [S. l.], v. 16, n. 6, p. 2427–2430, 2019. Disponível em: https://ignited.in/index.php/jasrae/article/view/11762. Acesso em: 4 apr. 2026.