1. The Annual Report of Protection Committee for Vehicle Pollution in Osaka Area, 1985–1995. Published by Osaka Prefecture and Osaka City Governments (in Japanese)
2. The Annual Report of the Ministry of Transportation, 1987–1995. Published by the Ministry of Transportation of Japan (in Japanese)
3. Study on the NMHC source fingerprint and photochemical reactivity;Wakamatsu;Res. Rep. Natl. Inst. Environ. Stud. Jpn.,1984
4. Source discrimination of short-term hydrocarbon samples measured aloft;Wadden;Environ. Sci. Technol.,1986
5. Source–receptor analysis of volatile hydrocarbons;Scheff;J. Environ. Eng.,1987