Shepard, H. H., R. D. Green, and M. L. Gibson. “Validation Repeatability of Measurement of Antibody Response to Ovalbumin in Beef Cattle”. Texas Journal of Agriculture and Natural Resources, vol. 6, Sept. 2017, pp. 81-86, https://txjanr.agintexas.org/index.php/txjanr/article/view/370.