@inbook{10.2307/j.ctt5hjc59.10,
 ISBN = {9780813554150},
 URL = {http://www.jstor.org/stable/j.ctt5hjc59.10},
 abstract = {Andrea Kahn, in “Defining Urban Sites,” contrasts the urban boundary conditions of a sixteenth-century sketch of Milan by Leonardo da Vinci to an historical eighteenth-century plan depicting an ideal Renaissance plan of Palmanuova. The Renaissance plan has a clear edge delineated by a heavy defensive boundary wall, while the Leonardo sketch has no clearly defined boundaries or edges. Although these two images convey different notions of representation (the former image is a plan, the latter an evocative sketch illustrating Leonardo’s imagined Milan), they reveal an important condition regarding the nature of boundaries. Kahn states “in Leonardo’s image no border divides},
 author = {Mo Zell},
 booktitle = {Sustaining Cities: Urban Policies, Practices, and Perceptions},
 pages = {95--108},
 publisher = {Rutgers University Press},
 title = {BEYOND BOUNDARIES},
 year = {2013}
}