Cavalcante, Agnes Yasmin Pitombeira, et al. “Effect of Ovarian Tissue Storage in Morus Nigra Extract on the Morphology and DNA Fragmentation of Ovine Preantral Follicles”. Semina: Ciências Agrárias, vol. 38, no. 4, Aug. 2017, pp. 1973-86, doi:10.5433/1679-0359.2017v38n4p1973.