Optimization of Ultrasound-Assisted Extraction of Tinospora crispa Stem, Phytochemical Screening, Total Phenolic Content and Anti Gout Potential Activity, Sukiman, Maman, Irawan Candra,, Putri Imalia Dwi, Utami Andita, Dewanta Avisani, and Septian Wira Aditia , Pharmacognosy Journal, April 2022, Volume 14, Issue 2, p.308-314, (2022)