Tui Lee, Chin, Cheuk Weng Chin, Mohd Shahkhirat Norizan, Choon Check Tan, Mohd Salihuddin, Mohd Yusof, Zaharah Abdul Rahman, Che Fauziah Ishak, y Mohamed Hanafi. 1. Revista Palmas 34 (1), 280-93. Accedido 24 de agosto de 2019. https://publicaciones.fedepalma.org/index.php/palmas/article/view/10687.