S. Paudyal, S. Karna, S. Khatiwada, L. Joshi, A. Tiwari, and S. Shrestha, “Study on the prevalence of Cryptosporidium in calves and HIV infected humans in the periphery of river basins of Kathmandu valley”, Int J Infection & Microbiol, vol. 2, no. 1, pp. 7–11, Apr. 2013.