ÇELİK HA, AVCI G, AYDIN İ, BÜLBÜL A, BÜLBÜL T. Effect of β-carotene on ovarium functions and Ovsynch success in repeat breeder cows. Kafkas Univ Vet Fak Derg, 15 (1): 87-94, 2009. DOI: 10.9775/kvfd.2008.82-A