1. Clar E. Polycyclic Hydrocarbons Vol. 1 Academic Press New York-London 1968.
2. Sampling of vehicle emissions for chemical analysis and biological testing.
3. Ermittlung polyzyklischer aromatischer Kohlenwasserstoffe im Automobileabgas in Abhangigkeit von Motorkoncept und Fahrzustand;Anonymous;VW-report UB-II,1975
4. Aromatic hydrocarbon II. Presence in the particulate phase of gasoline engine exhausts;Kotin P.;Arch. Ind. Hyg. Occup. Hyg.,1954
5. Carcinogenicity of atmospheric pollutants;Mittler S.;Ind. Med. Surg.,1957