In: SHELTON, M.; FIGUEIREDO, E. A. P. (Ed.). Hair sheep production in tropical and sub-tropical regions: with reference to Northeast Brazil and the countries of Caribbean, Central america, and South America. Sobral: Embrapa-CNPC; Davis: University of California, Small Ruminant Collaborative Research Support Program, 1990. p. 147-153.

http://www.alice.cnptia.embrapa.br/alice/handle/doc/514655

https://repositorioslatinoamericanos.uchile.cl/handle/2250/4080441