B.Y, K., O. M.C, and W. K.Y.S. “TRACE METAL CONCENTRATION IN THE SURFACE SEDIMENTS OF PAKA MANGROVE FORESTS, TERENGGANU, MALAYSIA”. Malaysian Journal of Science, vol. 23, no. 2, Aug. 2004, pp. 55-60, http://mojes.um.edu.my/index.php/MJS/article/view/8413.