H. A. Abdul-Ratha and B. N. Nadhom, “Extraction of biofilm produced by Escherichia coli that are isolated from animals infected with diarrhea and study its protective role”, KUFA J Vet Med Sci, vol. 7, no. 1B, pp. 211–228, Oct. 2016, doi: 10.36326/kjvs/2016/v7i1B4256.