Effect of Agricultural Model of using Fertilizer, Harvesting Time and Extraction Method on Phytochemical Contents and Antioxidant Activities from Mulberry Leaves Grown in Maha Sarakham Province, Thailand, Chanhan, Pharnuwan, Konsue Ampa, and Nammatra Rachanee , Pharmacognosy Journal, May 2019, Volume 11, Issue 3, p.531-535, (2019)