B. N. Ukwah, I. M. Ezeonu, C. T. Ezeonu, D. Roellig, and L. Xiao, “Cryptosporidium species and subtypes in diarrheal children and HIV-infected persons in Ebonyi and Nsukka, Nigeria”, J Infect Dev Ctries, vol. 11, no. 02, pp. 173–179, Feb. 2017.