Notes
Mitchell 2004
Graham and Marvin 1996
Graham and Marvin 2001
Mitchell 2001
Calthorpe Katz
Horan
Mitchell 2001
Mitchell 2005
Curwell et al.
Cooper et al.
Williamson et al.
Mitchell 2005
Mitchell 2005
Brecht
Deakin and Allwinkle Citation2006 Deakin and Allwinkle 2007