1. Alexander, C. (1965). The City Is Not a Tree. Architectural Forum, 122, 58-62.
2. Alexander, C. (2003). The Nature of Order: An Essay on the Art of Building and the Nature of the Universe. Center for Environmental Structure.
3. Batty, M. (2008). Cities as Complex Systems: Scaling, Interactions, Networks, Dynamics and Urban Morphologies. Working Papers Series, Centre for Advanced Spatial Analysis, University College, London, Paper 131, 62 p.
4. Batty, M. (2011). Building a Science of Cities. Working Papers Series, Centre for Advanced Spatial Analysis, University College, London, Paper 170, 15 p.
5. The New Science of Cities