Piyapong, C., and P. Ngokkham. “Shoaling and Aggressive Behaviour in Juvenile Fighting Fish (Betta Splendens)”. Interdisciplinary Research Review, vol. 13, no. 5, Jan. 2019, pp. 1-4, https://ph02.tci-thaijo.org/index.php/jtir/article/view/167401.