2Nesta,L.,PariPatel.National Patterns of Technology Accumulations:Use of Patent Statistics.Handbook of Quantitative Science and Technology Research,Boston:Kluwer Acarlemic Publishers,2005.
3Patel,P.Pavitt,K.Uneven (and divergent) technological accumulation amongst advanced countries:evidence and a framework of explanation.Trade,Growth and Technical Change,NY:Cambridge University Press,1998.