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2. European Transport Safety Council (ETSC). Ranking EU Progress on Road Safety, 13th Road safety performance index report. June 2019.
3. Serious Road Traffic Injuries in Europe, Lessons from the EU Research Project SafetyCube;Weijermars;Transp Res Rec,2018
4. Official Statistics of Finland (OSF): Statistics on road traffic accidents [e-publication]. December 2019. Helsinki: Statistics Finland. Access method:http://www.stat.fi/til/ton/2019/12/ton_2019_12_2020-01-23_tie_001_en.html. Access date: 3 February 2020.
5. Statistics Finland. Road Traffic Accidents, Road Users, Killed and seriously injured according to police and the hospital discharge register:http://tieliikenneonnettomuudet.stat.fi/PXWeb/pxweb/en/Tieliikenneonnettomuudet Access date: 3 February 2020.