Smartpos Budgeteer: Design and Implementation of a Python-Based Sales, Inventory, and Expense Management System Using Oop Principles. International Journal of Latest Technology in Engineering Management & Applied Science, [S. l.], v. 15, n. 6, p. 1184–1207, 2026. DOI: 10.51583/IJLTEMAS.2026.150600086. Disponível em: https://www.ijltemas.in/submission/online/article/view/5206.. Acesso em: 15 jul. 2026.