1. ISO 21707: Intelligent transport systems: integrated transport information, management and control—data quality in ITS systems. ISO, Switzerland (2008)
2. Kulmala, R., et al.: Quality criteria, requirements and assessment test plan. Deliverable of EIP+ 3.1 Testing and Validating of the Quality Recommendations and Results for Traffic Information from EIP (2015)
3. Kumala, R.: QUANTIS: how to utilise its results? Helsinki (2012)
4. Battelle: Traffic data quality measurement, Washington. https://ntl.bts.gov/lib/jpodocs/repts_te/14058_files/Traffic_Data_Quality_Measurement_Final.pdf (2004). Accessed 17 Feb 2017
5. Kulmala, R., et al.: Quality package for safety related and real-time traffic information services, EIP+ 3.1 Testing and Validating of the Quality Recommendations and Results for Traffic Information from EIP, EU (2017)