PROF. MONALI A. GURULE; KALYANI N. GULVE. IOT BASED SMART CART BILLING SYSTEM. International Journal of Innovations in Engineering Research and Technology, Maharashatra, India, v. 5, n. 5, p. 1–5, 2021. Disponível em: https://repo.ijiert.org/index.php/ijiert/article/view/1509. Acesso em: 31 jul. 2025.