Larson, D. W., Matthes, U., Kelly, P. E., Lundholm, J. and Gerrath, J. A. (2004) “The Urban Cliff Hypothesis and its relevance to ekistics”, Ekistics and The New Habitat, 71(424-426), pp. pp. 76-82. Available at: http://ekisticsjournal.org/index.php/journal/article/view/228 (Accessed: 26October2020).