1. Clamann, M., Bryson, M. (2021). Sharing spaces with robots: The basics of personal delivery devices. An info-brief from the Pedestrian and Bicycle Information Center. https://www.pedbikeinfo.org/cms/downloads/PBIC_InfoBrief_SharingSpaceswithRobots.pdf
2. Coombes, A., & Grush, B. (2022). Digitization, automation, operation, and monetization: The changing management of sidewalk and Kerb 2000–2025. In J. R. Vacca (Ed.), Smart Cities policies and financing: Approaches and solutions. Elsevier.
3. Dimensions. https://www.dimensions.com/collection/autonomous-delivery-vehicles
4. Draft technical standard (DTS) ISO 4448 “Ground-based automated mobility” is planned for release in multiple parts in 2022 or after.
5. Edwards, D. (2021). Demand for delivery robots has ‘quadrupled’ in past year, says Starship Technologies. https://roboticsandautomationnews.com/2021/05/19/demand-for-delivery-robots-has-quadrupled-in-past-year-says-starship-technologies/43328/