Patathananone S, Pothiwan M, Uapipatanakul B, Kunu W.  Inhibitory Effects of <i>Vernonia amygdalina</i> Leaf Extracts on Free Radical Scavenging, Tyrosinase, and Amylase Activities.  Prev. Nutr. Food Sci. 2023;28:302-311.  https://doi.org/10.3746/pnf.2023.28.3.302