N. Qian Hui and R. Mohd Salleh, “Determination of Courier’s Routes Delivery for Distributing Parcels in Perak”, EKST, vol. 2, no. 2, pp. 197–207, Nov. 2022, Accessed: Jul. 18, 2024. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/ekst/article/view/5310