1. Acs ZJ, Anselin L, Varga A (2002) Patents and innovation counts as measures of regional production of new knowledge. Res Policy 31(7):1069–85
2. Anselin L (1988) Spatial econometrics: methods and models. Kluwer Academic Publisher, Norwell
3. Arenas A, Cabrales A, Danon L, Díaz-Guilera A, Guimerà R, Vega-Redondo F (2010) Optimal information transmission in organizations: search and congestion. Rev Econ Des 14(1–2):75–93
4. Audretsch D, Feldman M (1996) R&D spillovers and the geography of innovation and production. Am Econ Rev 86(3):641–652
5. Autant-Bernad C, LeSage JP (2010) Quantifying knowledge spillovers using spatial econometric tools. J Reg Sci 51(3):427–652