Lubis, W. H., K. E. . Tampubolon, and A. . Saragih. “The Effect Of Gargling Green Tea On Salivary Flow Rate On Female With Xerostomia At Puskesmas Darussalam Medan”. IIUM Medical Journal Malaysia, vol. 16, no. 2, Dec. 2017, doi:10.31436/imjm.v16i2.1112.