*Publicación “Self- Deicing LED Signal for Railroads and Highway Intersections”:
http://www.trb.org/main/blurbs/180469.aspx
*Publicación “Improve Traffic Volume Estimates from MnDOT’s Regional Traffic Management Center”:
http://www.dot.state.mn.us/research/reports/2020/202002.pdf
*Publicación “Impacts of the Paris low-emission zone and implications for other cities”:
https://theicct.org/sites/default/files/publications/Paris-LEV-implications-03.12.2020.pdf