If you are interested in scientific articles and books, here are a few of them.

Three authors Wim Vanhaverbeke, Ine Vermeersch and Stijn De Zutte cover Flanders region with useful advices for the SMEs.

http://www.flandersdc.be/en/study/open-innovation-smes-how-can-small-companies-and-start-ups-benefit-open-innovation-strategies