I. N. Water and Delhi,
“Study / WSP”. Water and Sanitation Program - South Asia, Dhaka, Bangladesh.
A. Karlsson,
“Support to Uganda’s water and sanitation sector from the 1980's onwards : reflections and experiences”. SIDA, Swedish International Development Cooperation Agency, Stockholm, Sweden, p. 88 p.; tab.; fig.; photographs.
“Sustainability”. Molecular Diversity Preservation International, Water Editorial Office, MDPI, Basel, Switzerland.
“Sustainability science ”. Springer Verlag, Heidelberg, Germany.
L. Spinosa, Ayol, A., Baudez, J. - C., Canziani, R., Jenicek, P., Leonard, A., Rulkens, W., Xu, G., en van Dijk, L.,
“Sustainable and innovative solutions for sewage sludge management”,
Water, pp. P. 702-717; 3 tab.; 5 fig.; 3 scheme' s; .
“The sustainable cities programme (SCP) source book series”. UN-Habitat, United Nations Centre for Human Settlements, Nairobi, Kenya.