Alpha-Glucosidase Inhibitory Activity and Fractionation of Bioactive Compounds from bark Extracts of Sibucao (Caesalpinia sappan L.) In the Philippines, Tulin, Ea Kristine C., Loreto Ma Theresa P., and Tulin Edgardo E. , Pharmacognosy Journal, April 2017 , Volume 9, Issue 3, p.356-360, (2017)