R. Agrawal, N. Zade, R. Henry, Y. Parkhi, and T. Vyas, ““SK@D” ‘SK@D’ Smart Kit at Door - Internet of Things (IoT) Based Smart System Enabling Notifications”, Int. J. Adv. Soft Comput. Appl., vol. 18, no. 1, pp. 286–303, Mar. 2026.