D.-Y. Noh, Y.-Y. Park, K.-H. Jung, H.-W. Lee, and J.-E. Kye, “Indoor Disaster Detection and Real-Time Escape Guidance System”, IJET, vol. 7, no. 3.24, pp. 370–374, Aug. 2018, doi: 10.14419/ijet.v7i3.24.22688.