HAROON, Muhammad. Query Execution and Optimization in Distributed Database Environmen. International Journal of Modern Computation, Information and Communication Technology, [S. l.], v. 1, n. 4, p. 83–87, 2018. DOI: 10.65000/1v0sx253. Disponível em: https://gjpublications.com/index.php/IJMCICT/article/view/24. Acesso em: 21 oct. 2025.