“…This denotes that, under certain conditions, internal knowledge plays a primary role in the development of innovations. On the other hand, internal resources may be insufficient: innovative activities can also, in many cases, dependent on external and complementary knowledge sources (Tödtling et al, 2006;Doloreux and Shearmur, 2010;Siikonen et al, 2011, Malerba, 2007.In summary, it may be argued that the proclivity to use a specific source of knowledge can change from a company to another, in relation to the innovation type (e.g. technological, commercial, managerial), the nature (more or less tacit) of the needed knowledge, and the adopted innovation patterns (Amara et al, 2010;Consoli and Helche, 2013;Bolisani et al, 2014).…”