Burlis, Rikinovtian, 		Syamsuardi, Syamsuardi, AND 		Mansyurdin, Mansyurdin.
" The Grouping of Species Saurauia Willd. in West Sumatera Based on Morphometric Analysis and Pollination System" <em>Metamorfosa: Journal of Biological Sciences</em> [Online], Volume 6 Number 1 (15 April 2019)