1. Relationships among personal, indoor and outdoor NO2 measurements;Dockery;Environ. Int.,1981
2. Environment Agency Government of Japan. 1997. Quality of the Environment in Japan 1997. pp. 1–488.
3. Environment Agency Government of Japan. 1997. Report (Japanese title). Continuous Observation on Health Effects Caused by Environmental Nitrogen Oxides 1992–1995. pp. 1–50.
4. Air pollution study caused by automobile exhaust in the area along main trunk roads;Go;J. Japan Air Clean. Assoc.,1981
5. Kagawa, J., Shimizu, S., Yamano, Y., Toyoda. M., Hayashi, N., Ishihara., Shimizu, S., and Sakakida, K.1989. Health Effect of Automobile Exhaust from Road Transport on School Children. Proceedings of the 30th annual meeting of the Japan Society of Air Pollution, p. 498.