Azadirachta indica (Neem) Water Leaf Extract Inhibits Melanin Production and Tyrosinase Activity in B16F10 Melanoma Cells, Songtavisin, Thanitsara, Pratoomthai Benjamart, Gangnonngiw Warachin, and Naowaboot Jarinyaporn , Pharmacognosy Journal, July 2021, Volume 13, Issue 4, p.1030-1035, (2021)