Rosli, Nuraliah Alwani, et al. “Development and Implementation of a Smart Parking Spot Allocation System Based on the User’s Category and Priority Using Verilog HDL”. Journal of Electronic Voltage and Application, vol. 3, no. 2, Dec. 2022, pp. 15-32, https://penerbit.uthm.edu.my/ojs/index.php/jeva/article/view/12445.