Chinedu, U.O., Yofe, J.M., Henry, L., Wethe, J., Djagoun, G., Doucoure, I., y Ali, M., «Impact of prices and tariffs on fecal sludge management in Africa : a paper presented at the second conference on developments in faecal sludge mana..», presented at the 2012-10-29, S.l., 2012, p. 7 p.; 3 fig.

Snel, M. y Ali, M., «Lessons from community-based initiatives in solid waste», vol. no. 99. Water and Environmental Health at London and Loughborough (WELL), London, UK, p. 29 p. : 10 boxes, 1999.

Snel, M. y Ali, M., «Stakeholder analysis in local solid waste management schemes», vol. no. 69. Water and Environmental Health at London and Loughborough (WELL), London, UK, p. v, 29 p. : 2 boxes, 1 fig., 9 tab., 1999.