GANGULA, Arun K. The Importance of Testing and Validation in Legacy Application Upgrades. International Journal of Emerging Research in Engineering and Technology, [S. l.], v. 5, n. 1, p. 92–100, 2024. DOI: 10.63282/3050-922X.IJERET-V5I1P111. Disponível em: https://ijeret.org/index.php/ijeret/article/view/297. Acesso em: 29 oct. 2025.