Srinivasan , P.; Balasubramaniam, G.; Gopalakrishnamurthy, T.; Balachandran, P. Pathology of Oviduct in Sub Optimally Producing Commercial Layer Chicken. Int. J. Poult. Sci. 2012, 11 (9), 577–581. https://doi.org/10.3923/ijps.2012.577.581.