Reddy, I. (2008) “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”, International Journal of Poultry Science, 7(11), pp. 1100–1104. doi:10.3923/ijps.2008.1100.1104.