Karpinski, Elizabeth (July 3, 2021). "Estimating the Effect of Protected Bike Lanes on Bike-Share Ridership in Boston: a Case Study on Commonwealth Avenue". Case Studies on Transport Policy. 9 (3): 1313–1323. doi:10.1016/j.cstp.2021.06.015. ISSN2213-624X.
Karpinski, Elizabeth (July 3, 2021). "Estimating the Effect of Protected Bike Lanes on Bike-Share Ridership in Boston: a Case Study on Commonwealth Avenue". Case Studies on Transport Policy. 9 (3): 1313–1323. doi:10.1016/j.cstp.2021.06.015. ISSN2213-624X.