Abdul Razak, Raz Nur Izzaty, and Norhalina Senan. “Mobile Learning for Manually Coded Malay Sign Language Using Augmented Reality”. Applied Information Technology And Computer Science, vol. 3, no. 1, June 2022, pp. 47-59, https://publisher.uthm.edu.my/periodicals/index.php/aitcs/article/view/2285.