8[1]Vittorio Chiesa. The externalization of R&D activities and the growing market of product development services.R&D Management 2004,34,1: 66.
9[3]Michael I. Luger, Irwin Feller, Catherine S. Renault. Evaluation of Maine's Public Investment in Research & Development. Office of Economics DevelopmentUniversity of North Carolina at Chapel Hill, October 2001.
