ก๊าซชีวภาพ แหล่งพลังงานทดแทน (Biogas is a Renewable Energy). Science Essence Journal, [S. l.], v. 26, n. 2, 2011. Disponível em: https://ejournals.swu.ac.th/sej/article/view/1271. Acesso em: 24 oct. 2026.