Total Polyphenols, Total Flavonoids, Antioxidant Activity and Inhibition of Tyrosinase Enzymes from Extract and Fraction of Passiflora ligularis Juss, Wiliantari, Selvia, Iswandana Raditya, and Elya Berna , Pharmacognosy Journal, June 2022, Volume 14, Issue 3, p.672-680, (2022)