Santhanaraju Vairappan, C., and P. Siew-Moi. “Morphology and Halochamigrene Metabolite Content of Laurencia Majuscula (Rhodomelaceae, Ceramiales) from the Spratly Islands”. Malaysian Journal of Science, vol. 24, no. 2, Aug. 2005, pp. 29-36, http://mojes.um.edu.my/index.php/MJS/article/view/8304.