- https://pure.tue.nl/ws/portalfiles/portal/16601170/BlockenPedestrian2016.pdf [most important paper, check Section 8]
- https://www-sciencedirect-com.proxy.library.cornell.edu/science/article/pii/S0360132312002776
- https://journals.sagepub.com/doi/10.1177/1097196304044396
- https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7148650/
- https://www-sciencedirect-com.proxy.library.cornell.edu/science/article/pii/S0167610506000882