A. A. Hafidz, H. Pujiharsono, K. Kadarisman, and M. Yusro, “Integrated Visitor Management System with Smart Hand Sanitizer based on IoT Approach”, ijeeemi, vol. 5, no. 3, pp. 108–115, Aug. 2025, doi: 10.35882/ijeeemi.v5i3.184.