Mohamed, H., and Y. Kien-Thai. “A Checklist of Mosses for the North-Eastern Region of the Langkawi Islands, Peninsular Malaysia With Additional Records for the Langkawi Group of Islands”. Malaysian Journal of Science, vol. 24, Nov. 2017, pp. 111-7, https://samudera.um.edu.my/index.php/MJS/article/view/8826.