Michael Branion-Calles (2019). "Impacts of study design on sample size, participation bias, and outcome measurement: A case study from bicycling research". Journal of Transport & Health. 15: 100651. doi:10.1016/j.jth.2019.100651. hdl:10044/1/80109. S2CID204387948.
Michael Branion-Calles (2019). "Impacts of study design on sample size, participation bias, and outcome measurement: A case study from bicycling research". Journal of Transport & Health. 15: 100651. doi:10.1016/j.jth.2019.100651. hdl:10044/1/80109. S2CID204387948.
Michael Branion-Calles (2019). "Impacts of study design on sample size, participation bias, and outcome measurement: A case study from bicycling research". Journal of Transport & Health. 15: 100651. doi:10.1016/j.jth.2019.100651. hdl:10044/1/80109. S2CID204387948.