Haryoto, Haryoto, 		Santoso, Broto, AND 		Nugroho, Hafid.
" Antioxidant Activity of Polar Fraction of Methanol Extract from Tree Bark Of Shorea acuminatissima with DPPH Method" <em>Jurnal ILMU DASAR</em> [Online], Volume 8 Number 2 (5 July 2007)