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Among the activities undertaken by the DCUN members, the network encourages the development of comparative research that questions the processes of urban diffusion, in different fields and urban contexts. The outcome of this research is now featured in form of Research Notes.The DCUN Research Notes are available below: Research Note No.1: "Periurban farming in an Asian context: metropolitan processes affecting agriculture in the Shanghai and Hanoi countryside" by Etienne Monin (To access to the DCUN Research Note click here).&#160;