Batty, M; Axhausen, KW; Giannotti, F; Pozdnoukhov, A; Bazzani, A; Wachowicz, M; Ouzounis, G; (2012) Smart cities of the future. The European Physical Journal Special Topics , 214 (1) pp. 481-518. 10.1140/epjst/e2012-01703-3. Green open access