Lestari, D., et al. “Variation and Association of Avian β-Defensin 2 Gene With the Concentration of Immunoglobulin Y and the Titer of Newcastle-Disease Antibody in IPB-D1 Chicken”. Tropical Animal Science Journal, vol. 45, no. 2, May 2022, pp. 121-7, https://doi.org/10.5398/tasj.2022.45.2.121.