Caschili, Simone and De Montis, Andrea and Chessa, Alessandro and Deplano, Giancarlo  Weighted networks and community detection: planning productive districts in Sardinia.   In:  Planning, complexity and new ICT.   (ed. by G. Rabino, M. Caglioni) Planning, complexity and new ICT , pp. 27-36.  ISBN 978-88-6055-415-4      (2009)