Ribeiro, Edson Luiz de Azambuja, et al. “Production and Characteristics of Wool from Sheep of Undefined Pedigree in the Region of Londrina - State of Paraná”. Semina: Ciências Agrárias, vol. 12, no. 1, Mar. 1991, pp. 21-25, doi:10.5433/1679-0359.1991v12n1p21.