D. L. Lan, J. P. Gu, R. Xing, C. L. Yuan, L. Cui, X. G. Hua, and Z. B. Yang. “Molecular Cloning and Phylogenetic Analysis of the E Gene of Transmissible Gastroenteritis Virus (TGEV) Isolated in China”. African Journal of Pig Farming, vol. 8, no. 1, Oct. 2020, pp. 1-4, https://elixirpublishers.in/index.php/ajpf/article/view/790.