1. City of London Development Plan, Subject Study St. Paul's Heights, 1978.
2. City of London, Report of the City Planning Officer on Swiss Re, 23 February 2000.
3. Collins, G.R., Collins, C.C., 1965 (after Der Städtebau nach seinen künstlerischen Grundsätzen, 1889). Camillo Sitte and the Birth of Modern City Planning. Columbia University, Studies in Art History, no. 3. Phaidon Publishing and Random House.
4. The Concise Townscape;Cullen,1961