Chevakidagarn, Panalee, Ongpat Wanaglad, and Sommai Chiayvareesajja. 2015. “Optimum Carbon/Nitrogen Ratio for Upgrading Single-Stage Activated Sludge Process in the Frozen Seafood Industry”. Science & Technology Asia 17 (4):11-21. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41166.