1. Effect of driver's age on nighttime legibility of highway signs;Sivak;Hum Factors,1981
2. 2 International Window Film Association - IWFA. (2015). State WIndow Tinting Rules & Laws: http://www.iwfa.com/Portals/0/PDFDocs/Law_Charts/State_Law_Chart_10.14.15.pdf
3. 3 Washington State Law. [cited 2022 Feb 22]. Available from https://www.wsp.wa.gov/driver/vehicle-equipment-requirements
4. 4 California Car Laws. California car laws, rules e regulation. California: [cited 2021 Oct 21]. Available from: http://www.californiacarlaws.com/window-tint/
5. 5 Brazilian Traffic Regulation. [cited 2021 Oct 21]. Available from: https://www.gov.br/infraestrutura/pt-br/assuntos/transito/conteudo-contran/resolucoes/resolucao_contran_254.pdf