(5) - The phrases “things happen because things happen” and “life between buildings” were coined by Jan Gehl.  His book Life between Buildings is essential reading for anyone who wants to understand  how public spaces work.

Gehl, Jan.  1971.  Life Between Buildings, available via Gehl Architects,
http://www.gehlarchitects.dk/lifebetweenbu.asp, accessed November 2007.