Coping with the heterogeneity of external knowledge sources: Corresponding openness strategies and innovation performance Hamdy Abdelaty; Daniel Weiss;

Inbound open innovation and firm performance Federico Moretti; Daniele Biancardi;

Open innovation as the missing link in the mediated model among R&D educational heterogeneity, innovation and performance Fabijan Leskovec; Matej ¿erne; Darja Peljhan;