Bates, M. C., N. C. Parker, and C. B. Fedler. “Production of Spirulina Platensis from Growth Media Containing Anaerobically Digested Cattle Waste”. Texas Journal of Agriculture and Natural Resources, vol. 8, Nov. 2016, pp. 89-98, https://txjanr.agintexas.org/index.php/txjanr/article/view/259.