Raj, V. et al. 2009. Sequence Analysis and Expression of the Phosphoprotein (P) Gene of a less Virulent Newcastle Disease Virus (D58) Isolated from an Unvaccinated Village Chicken. International Journal of Poultry Science. 8, 11 (Oct. 2009), 1112–1120. DOI:https://doi.org/10.3923/ijps.2009.1112.1120.