1. Allison, J.R., Lemley, M.A., 2001. The Growing Complexity of the United States Patent System. IP And Technology Law Working Papers Series, Paper 2-01, University of Berkeley, CA, USA.
2. Complex Applications – A Return to First Principles;Dack;IIC International Review of Industrial Property and Copyright Law,2001
3. Dernis, H., Guellec, D., van Pottelsberghe de la Potterie, 2001. Using Patent Counts for Cross-country Comparisons of Technology Output. STI Review, 27, OECD, pp. 129–146.
4. Dudas, J.W., 2005. Statement of the Honorable Jon W. Dudas Under secretary of commerce for intellectual property and director of the united stated patent and trademark office before the subcommittee on the judiciary united state senate: “The Patent System: Today and Tomorrow”.
5. The European patent convention as a guide to modernizing our patent examination system;Duncan;Journal of the Patent Office Society,1965