Pritha Narinder Bagga, Vaidehi Korke, Aishwary Soundattikar, and Ms. Pooja Ambatkar. “AUTOMATIC BILLING SYSTEMS IN SHOPPING MALLS USING LIFI MODULE”. International Engineering Journal For Research & Development, vol. 9, no. 2, May 2024, p. 7, https://iejrd.com/index.php/ /article/view/3150.