Alitabar, Aliakbar, Hosseinifard, Seyyed Mehdi, Ghobadi, Shayan. “Comparative effect of  Astaxanthine and red beet (Beta vulgaris conditiva) on blood serum factors of rainbow trout 
(Oncorhynchus mykiss).” Breeding and Aquaculture Sciences Journal, vol. 4, no. 11, 2017, pp. 43-50.