D. Lestari, “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”, Trop. Anim. Sci. J., vol. 45, no. 2, pp. 121–127, May 2022, doi: 10.5398/tasj.2022.45.2.121.