Ly, T. L. K., T. N. Ngo, and H. Hideki. “Study on Effectiveness of Activated Charcoal and Wood Vinegar on Prevention of Piglet Diarrhea”. CTU Journal of Innovation and Sustainable Development , vol. 11, no. 2, July 2019, pp. 9-15, doi:10.22144/ctu.jen.2019.018.