P. H. M. Rodrigues, C. de S. Lucci, and A. L. de Castro, “Effects of sodium lasalocid and roughage/concentrate ratio on ruminal fermentation in dry cows”, Braz. J. Vet. Res. Anim. Sci., vol. 37, no. 3, pp. 253–258, Jan. 2000, doi: 10.1590/S1413-95962000000300014.