Valenzuela, Athena Jan, 		Santos, Brian S.Santos, 		Quilang, Jonas P. Quilang1, AND 		Cao, Ernelea.
" Comparative Use of Meristic and Geomorphometric Analyses of Vegetative and Floral Characters in Studying Intraspecific Variation in Portulaca grandiflora (Hook)" <em>Science Diliman: A Journal of Pure and Applied Sciences</em> [Online], Volume 23 Number 2 (3 May 2012)