Nanoparticle Synthesis and Cytotoxicity of Kaempferia pandurata Roxb. Extract to the Growth of MDA-MB-231 Breast Cancer Cell Line, Rahmawanti, Risya Amelia, Fadilah Fadilah, Edina Brenda Cristie, Wiyono Lowilius, and Paramita Rafika Indah , Pharmacognosy Journal, February  2020, Volume 12, Issue 1, p.109-114, (2020)