Kortum, S., & Lerner, J. (1997). Stronger protection or technological revolution: What is behind the recent surge in patentingn. National Bureau of Economic Research.
Cita Chicago (17th ed.)Kortum, Samuel, i Josh Lerner. Stronger Protection or Technological Revolution: What Is Behind the Recent Surge in Patentingn. Cambridge: National Bureau of Economic Research, 1997.
Cita MLA (9th ed.)Kortum, Samuel, i Josh Lerner. Stronger Protection or Technological Revolution: What Is Behind the Recent Surge in Patentingn. National Bureau of Economic Research, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.