1. Lephardt and Bast. 1985; The Economics of Taxi Deregulation. Heartland Policy Study No. 3.
2. Canadian Census. 1996; http://www.statcan.ca Accessed November 2007.
3. Canadian Census. 2001; http://www.statcan.ca Accessed November 2007.
4. A regression model of the number of taxicabs in US cities;Schaller;Journal of Public Transportation,2005
5. Estimation of relationships for limited dependent variables;James Tobin;Econometrica,1958