Charoenvisal, N., B. Supannamoke, R. Koopman, and J. Sasipreeyajan. “Efficacy of different vaccination programs of recombinant HVT-NDV vaccine against genotype VII NDV Challenge in broiler chickens”. The Thai Journal of Veterinary Medicine, vol. 48, no. 4, Mar. 2019, pp. 603-11, https://he01.tci-thaijo.org/index.php/tjvm/article/view/179827.