UtamiY. M., WidyariniS., and WibowoM. H. “Comparative Biological Pathotyping of Newcastle Disease Virus Sub-Genotypes VIIg, VIIh, and VIIi in Specific Pathogen Free (SPF) Chickens”. Tropical Animal Science Journal 46, no. 2 (May 24, 2023): 172-179. Accessed May 5, 2024. https://journal.ipb.ac.id/index.php/tasj/article/view/44782.