Salon, Deborah, Matthew Wigginton Conway, Kailai Wang, and Nathaniel Roth. “Heterogeneity in the Relationship Between Biking and the Built Environment”. Journal of Transport and Land Use 12, no. 1 (January 28, 2019). Accessed April 20, 2024. https://www.jtlu.org/index.php/jtlu/article/view/1350.