@article { rombetper2015, author = "Romão, R and Bettencourt, E and Pereira, RMLN and Marques, C C and Baptista, MC and Barbas, J P and Oliveira, E and Bettencourt, C and Sousa, Mário", title = "Ultrastructural Characterization of Fresh and Vitrified In Vitro- and In Vivo-Produced Sheep Embryos", year = "2015" }