1. Anderson M. D. (2001). “Travel modeling for smaller urban areas using a single internal trip purpose.” Proc. 80th Annual Meeting (CD-Rom) Transportation Research Board Washington D.C. preprint.
2. Bureau of the Census. (1983). “ 1980 Census of population number of inhabitants United States summary .” Rep. PC 80-1-A1 U.S. Dept. of Commerce Washington D.C.
3. “Census Internet.” (1998). 〈http://www.asc.edu/archives/populate/sheet.html〉 (October 7 1998).
4. Ismart D. (1990). Calibration and adjustment of system planning models Federal Highway Administration Washington D.C.
5. Khisty C. J. and Rahi M. Y. (1987). “Evaluation of three inexpensive travel demand models for small urban areas.” Transportation Research Record No. 1283 Transportation Research Board Washington D.C. 70–78.