Reddy, I.; Kiran, G. R.; Mondal, S.; Anandan, S. Immunization Against Vasoactive Intestinal Peptide and Its Effects on Prolactin, Steroid, Luteinizing Hormone and Egg Production During Mid Laying Cycle in Punjab Brown (PB3 ) Birds. Int. J. Poult. Sci. 2008, 7 (11), 1100–1104. https://doi.org/10.3923/ijps.2008.1100.1104.