Udchachon, S. .; Pongmanee, K. .; Boonruangrod, R. .; Attamangkune, S. .; Ruangpanit, Y. . Effect of marigold-derived products as pigment source on growth performance, antioxidant activity and liver enzymes of broiler chickens. Agr. Nat. Resour. 2022, 55, 925–934.