Hassanzadeh, Mohammad, et al. “Evaluation of the Immunogenisity of Immune Complex Infectious Bursal Disease Vaccine Delivered In Ovo to Embryonated Eggs or Subcutaneously to Day-Old Chickens”. International Journal of Poultry Science, vol. 5, no. 1, Dec. 2005, pp. 70–74, https://doi.org/10.3923/ijps.2006.70.74.