1. Balcombe, R., Mackett, R., Paulley, N., Preston, J., Shires, J., Titheridge, H. … White, P. (2004). The demand for public transport: A practical guide. Retrieved from http://www.demandforpublictransport.co.uk/TRL593.pdf
2. Calgary Transit. (2002). A review of bus rapid transit. Retrieved from http://www.calgarytransit.com/pdf/brt%7B_%7Dreport.pdf
3. Bus frequency determination using passenger count data
4. City of Calgary. (2013). Changing travel behaviour in the Calgary Region. Retrieved from http://www.calgary.ca/Transportation/TP/Documents/forecasting/Changing Travel Behaviour in the Calgary Region_v1_forWeb_2013-06-04.pdf