1. ACEA Tax Guide;ACEA,2015
2. Dardis, C., 2012. Package: Peirce [WWW Document]. R-Forge. URL https://r-forge.r-project.org/scm/viewvc.php/*checkout*/pkg/Peirce/Peirce-manual.pdf?Root=peirce (accessed 01.12.16).
3. Steuerliche Behandlung von Firmenwagen in Deutschland;Diekmann,2011
4. Establishing bonds between vehicle certification data and real-world vehicle fuel consumption – a vehicle specific power approach;Duarte;Energy Convers. Manag.,2015
5. EEA, 2011. COPERT 4 - Estimating emissions from road transport [WWW Document]. Eur. Environ. Agency. URL 〈http://www.eea.europa.eu/publications/copert-4-2014-estimating-emissions〉 (accessed 11.02.16).