Dominic Pereira Westeous, Roy Anitha, and Thangavelu Lakshmi. 2018. “Effect of Lutein from Marigold on Nitric Oxide Production and Nitric Oxide Synthase Enzyme – An in Vitro Study”. International Journal of Research in Pharmaceutical Sciences 9 (4):998-1001. https://ijrps.com/home/article/view/4401.