Cairns, S., Sloman, L., Newson, C., Anable, J., Kirkbride, A., Goodwin, P. (2008). Smarter choices: Assessing the potential to achieve traffic reduction using 'Soft measures'. Transport Reviews, 28(5), 593-618.

Kearney, A. R., & De Young, R. (1995). A knowledge-based intervention for promoting carpooling. Environment and Behavior, 27, 5, 650-678.