Doctoral thesis (2011) - L. Kester (author) , HJ Hultink (promotor) , A Griffin (copromotor) , T Elfring (copromotor) , F. Langerak (copromotor) , SC Santema (copromotor) , B van Looy (copromotor) , Henk W. Volberda (copromotor) , Jan P.L. Schoormans (copromotor)