The Effect Hypoglycemic of Ethanol Extract Combination Red Betel Leaf (Piper crocatum) and Dayak Onion (Eleutherine palmifolia Merr) in Streptozotocin-Induced, Anggi, Viani, and , Pharmacognosy Journal, November 2019, Volume 11, Issue 6s, p.1401-1405, (2019)