Regalado, Joshua, 		Campos, Wilfedo, AND 		Santillan, August.
" Population Biology of <i>Tripneustes gratilla</i> (Linnaeus) (Echinodermata) in Seagrass Beds of Southern Guimaras, Philippines" <em>Science Diliman: A Journal of Pure and Applied Sciences</em> [Online], Volume 22 Number 2 (14 March 2011)