1. Wolman H, Galster G, Hanson R, et al. The fundamental challenge in measuring sprawl: which land should be considered?[J]. The Professional Geographer, 2005, 57(1): 94-105.

http://www.tandfonline.com/doi/abs/10.1111/j.0033-0124.2005.00462.x#.UtlDizeS3IU

2. Cutsinger J, Galster G, Wolman H, et al. Verifying the Multi‐Dimensional Nature of Metropolitan Land Use: Advancing the Understanding and Measurement of Sprawl[J]. Journal of Urban Affairs, 2005, 27(3): 235-259.

3. Horner M W. Exploring metropolitan accessibility and urban structure[J]. Urban Geography, 2004, 25(3): 264-284.

4. Horner M W, Murray A T. Spatial representation and scale impacts in transit service assessment[J]. Environment and Planning B, 2004, 31: 785-798.

5. CERVERO R. Transit-oriented development’s ridership bonus: a product of self-selection and public policies[J]. Environment and Planning A, 2007, 39(9).