Ponce, J.L., Mac?as, U., ?lvarez, F.D., Vel?zquez, J.V., Avenda?o, L. and Ly, J. 2013. Low doses of gonadotropin chorionic equine (GCe) to Pelibuey and Pelibuey x Romanov ewes. Cuban Journal of Agricultural Science. 47, 1 (Mar. 2013).