Jung, In-Hwan, Jae-Moon Lee, and Kitae Hwang. “An MQTT Based Real Time LBS System for Vehicles and Pedestrians”. International Journal of Engineering & Technology 7, no. 3.24 (August 10, 2018): 125–130. Accessed May 5, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/22521.