Tristão, Hélcio Martins, Pedro Carlos Oprime, Daniel Jugend, and Sérgio Luis da Silva. 2013. “Innovation in Industrial Clusters: A Survey of Footwear Companies in Brazil”. Journal of Technology Management &Amp; Innovation 8 (3). Santiago, Chile:45-56. https://doi.org/10.4067/S0718-27242013000400005.