NURUL JADID, RISKA Y RACHMAN, SYLVIANA ROSYDA HARTANTI, NURLITA ABDULGANI, WIWI WIKANTA, and WIRDHATUL MUSLIHATIN, “METHANOL EXTRACT OF PIPER RETROFRACTUM VAHL. POTENTIALLY MEDIATES MAST CELL STABILIZATION”, ijpbs, vol. 7, no. 2, pp. 379–383, Jun. 2016.