W. - J. Ng,
“Sequencing batch reactor (SBR) treatment of wastewaters”, vol. no. 28. Environmental Sanitation Information Center, ENSIC, Bangkok, Thailand, p. 54 p.: fig., tab., 1989.
W. Fresenius, Schneider, W., Boehnke, B., and Poeppinghaus, K.,
Waste water technology : origin, collection, treatment and analysis of waste water. Berlin, Germany: Springer Verlag, 1989, p. ca. 1200 p.: fig., tab.