P. Siew-Moi, L. Phaik-Eem, O. Jillian Lean Sim, Y. Hui-Yin, and N. Woan-Shien, “Marine algae of Perak Island, Jarak Island and the Sembilan Group of Islands in the Straits of Malacca”, Malaysian J. Sci., vol. 27, pp. 47–60, Dec. 2008.