Ponnusamy, P., Kirubaharan, J. J., & Chandramohan, A. (2009). Sequence Analysis of HN and F Genes of a less Virulent Newcastle Disease Virus Isolated from Unvaccinated Village Chicken. International Journal of Poultry Science, 8(10), 985–994. https://doi.org/10.3923/ijps.2009.985.994