1. Urban agriculture: An oximoron?,1996
2. Urban Agriculture: Food, Jobs and Sustainable Cities,1996
3. Cities in a Globalizing World: Global Report on Human Settlements,2001
4. Cities Feeding People: An Examination of Urban Agriculture in East Africa;Egziabher,1994
5. Waste Composting for Urban and Peri-Urban Agriculture: Closing the Rural Urban Nutrient Cycle in Sub-Saharian Africa;Drechsel,2001