Shankar, B.P., et al. “Pathogenicity for Chickens of Avian Influenza Virus Strain H9N1 Isolated from Water Coot in India”. International Journal of Poultry Science, vol. 8, no. 3, Feb. 2009, pp. 252–255, https://doi.org/10.3923/ijps.2009.252.255.