1. Invasiveness, invasibility, and the role of environmental stress in the spread of non-native plants;Alpert;Perspectives in Plant Ecology, Evolution, and Systematics,2000
2. Appl, R., 2007. Development of green roofs in Europe. Paper presented at the Annual Greening Rooftops for Sustainable Communities Conference, Minneapolis, MN.
3. Banslaben, J., McIntosh, A., 2010. Green roofs in Seattle: a survey of vegetated roofs and rooftop gardens. Paper presented at the Annual Cities Alive Conference, Vancouver, Canada.
4. Bell, S.V., 2003. The greening of the Peggy Notebaert Nature Museum. Paper presented at the Annual Greening Rooftops for Sustainable Communities Conference, Chicago, IL.
5. Initial agronomic performances of Mediterranean xerophytes in simulated dry green roofs;Benvenuti;Urban Ecosystems,2010