RAVI MANI. MIGRATION STRATEGIES FOR LEGACY BILLING SYSTEMS TO CLOUD PLATFORMS: CHALLENGES, APPROACHES, AND FUTURE DIRECTIONS. INTERNATIONAL JOURNAL OF COMPUTER ENGINEERING AND TECHNOLOGY, [S. l.], v. 16, n. 01, p. 1506–1520, 2025. Disponível em: https://ijcet.in/index.php/ijcet/article/view/296.. Acesso em: 4 feb. 2026.