Derahman, M.N., W. Salman, M.K. Abdullah, and M. Othman. 2007. “PERFORMANCE AND COST COMPARISONS FOR A-PON AND S-PON FTTH SYSTEMS”. Journal of Information and Communication Technology 6 (April):51-58. https://e-journal.uum.edu.my/index.php/jict/article/view/8068.