Sittijunda, Sureewan. 2015. “Biogas Production from Hydrolysate Napier Grass by Co-Digestion With Slaughterhouse Wastewater Using Anaerobic Mixed Cultures”. Asia-Pacific Journal of Science and Technology 20 (3):323-36. https://so01.tci-thaijo.org/index.php/APST/article/view/42637.