7Nugent R. The impact of urban agriculture on the household and local economics: GCGF theme 3[C]//Bakker N, Dubbeling M, Guendel S, et al. Growing Cities, Growing Food, Urban Agriculture on Policy Agenda. Germany: ProffOffsetdruck, Eurasburg (InWent), 2000: 89.
8Liu S H, Cai J M, Yang Z S. Migrants' access to land in peri-urban Beijing [J]. Urban Agriculture Magazine, 2003(1): 6-8.
9Novo M G, Murphy C. Urban agriculture in the city of Havana: A popular response to a crisis[G]//Growing Cities Germany: Proff Offsetdruck, Eurasburg(InWent), 2000: 329-349.