1. Constructing Regional Advantage: Platform Policies Based on Related Variety and Differentiated Knowledge Bases
2. Bnu Consulter des thèses françaises en texte intégral 2017 available at:http://www.bnu.fr/catalogues/theses/consulter‐des‐theses‐francaises‐en‐texte‐integral.
3. Business Dictionary “Cluster analysis” 2017 available at:http://www.businessdictionary.com/definition/clusteranalysis.html.