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- The High Cost of Free Parking (2005) https://en.wikipedia.org/wiki/The_High_Cost_of_Free_Parking 96 comments
- The High Cost of Free Parking (1997) [pdf] http://www.uctc.net/papers/351.pdf 20 comments
- The high cost of free parking https://www.vox.com/videos/2017/7/19/15993936/high-cost-of-free-parking 3 comments bicycling
- The High Cost of Free Parking [pdf] http://shoup.bol.ucla.edu/highcostfreeparkingchapter1.pdf 9 comments reddit.com
- The High Cost of Free Parking http://www.raisethehammer.org/index.asp?id=072 61 comments reddit.com