Carassus, J., N. Andersson, A. Kaklauskas, J. Lopes, A. Manseau, L. Ruddock, and G. de Valence. “Moving from Production to Services: A Built Environment Cluster Framework”. International Journal of Strategic Property Management, vol. 10, no. 3, Oct. 2010, pp. 169-84, doi:10.3846/1648715X.2006.9637551.