M. S. Zianal, H. Abdullah, and I. Khan, “Ultra Wide Band localization and tracking hybrid technique using VRTs”, IJIE, vol. 4, no. 3, Dec. 2012, Accessed: Apr. 08, 2026. [Online]. Available: https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/625