Sirianuntapiboon, Suntud, and Tusanee Tondee. 2015. “Application of Packed Cage RBC System for Treating Waste Water Contaminated With Nitrogenous Compound”. Science & Technology Asia 5 (1):28-39. https://ph02.tci-thaijo.org/index.php/SciTechAsia/article/view/41922.