Worawimut, C., A. Watanapa, S. Vivanpatarakij, and W. Wiyaratn. “Learning Management of Small-Scale Pig Farmers to Adopt Biogas Coproduction: A Case Study of Ratchaburi Province”. Journal of Technical and Engineering Education, vol. 15, no. 2, May 2024, https://so10.tci-thaijo.org/index.php/FTEJournal/article/view/1045.