A. S. C. Maia, R. G. da Silva, E. C. A. Bertipaglia, and M. C. Muñoz, “Genetic variation of the hair coat properties and the milk yield of Holstein cows managed under shade in a tropical environment”, Braz. J. Vet. Res. Anim. Sci., vol. 42, no. 3, pp. 181-187, Jun. 2005.