Cinnamic Acid in Frankincense Sap as a Criterion for Determining the Best Mother Plant for Vegetative Propagation of Styrax benzoin (Sumatra Benzoin) in Sumatra, Indonesia. - Nurwahyuni, Isnaini; Nababan, Benardo; Pangoloi, Svencer; Situmorang, Manihar (International Journal of Forestry Research, 2022)