J. Atencio, J. Fernandez, A. Gernat, and J. Murillo, “Effect of Pine Wood Shavings, Rice Hulls and River Bed Sand on Broiler Productivity When Used as a Litter Sources”, Int. J. Poult. Sci., vol. 9, no. 3, pp. 240–243, Feb. 2010, doi: 10.3923/ijps.2010.240.243.