Anti-Elastase, Anti-Tyrosinase and Anti-Oxidant of Rubus Fraxinifolius Stem Methanolic Extract, Desmiaty, Yesi, Saputri Fadlina Chany, Hanafi Muhammad, Prastiwi Rini, and Elya Berna , Pharmacognosy Journal, March 2020, Volume 12, Issue 2, p.271-275, (2020)