Ploeg, J.D. vaVAn der, Bouma , J., Rip, A., Rijk enberg, F.H.J., Ventura, F. and Wisk erke, J.S.C. (2004), On regimes, novelties and co-production, in: J.S.C. Wisk erke and J.D. vaVAn der Ploeg (eds) Seeds of Transition: Essays on Novelty Production, Niches and Regimes in Agriculture, Assen: Royal Van Gorcum, pp. 1–27.