Li, Y. (2009). Borders and distance in kowledge spillovers: dying over time or dying with age?: Evidence from patent citations. CESifo.
Chicago-Zitierstil (17. Ausg.)Li, Yao. Borders and Distance in Kowledge Spillovers: Dying over Time or Dying with Age?: Evidence from Patent Citations. Munich: CESifo, 2009.
MLA-Zitierstil (9. Ausg.)Li, Yao. Borders and Distance in Kowledge Spillovers: Dying over Time or Dying with Age?: Evidence from Patent Citations. CESifo, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.