Ferguson, E. (2000). Parking management and commuter rail: the case of Northeastern Illinois. Journal of Public Transportation, Vol. 3, No. 2. pp. 99-121.
Merriman. D. (1998). How many parking spaces does it take to create one additional transit passenger? Regional Science and Urban Economics, Vol. 28, pp. 565-584.
Reichenberg, L. (2001). Fifty years of innovations: parking. National Parking Association, May, pp. 26- 29.