P. D. Jenssen, Heeb, J., Huba-Mang, E., Gnanaken, K., Warner, W. S., Refsgaard, K., Senstrom, T. A., Guterstam, B., and Alsen, K. W.,
“Ecological sanitation and reuse of wastewater : ecosan, a thinkpiece on ecological sanitation”. Agricultural University of Norway, Oslo, Norway, p. 18 p. : photogr., 2004.
