1. Wichmann H. E. Mueller W. Allhoff P. Beckmann M. Bocter N. Csicsaky M. J. Jung M. Molik B. and Schoeneberg G. Investigation of Health Effects during the Smog-situation in January * 1985 in North-rhine Westfalia in German. Report to the Ministry of Labour Health and Social Affairs of the State of North Rhine-Westfalia FRG. Dusseldorf 1985.
2. Analysis of the Smog Episode from January 16 to 21, 1985, in the Rhine-Ruhr-District (in German). LIS-Berichte;Kuelske S.;Landesanstalt fur Immissionsschutz Essen,1985
3. Meteorologic Situation during the Smog Episode in the Ruhr District in January 1985 (in German);Perkuhn J.;Report of the Wetteramt Essen,1985
4. Smog episodes in the Ruhr District since 1980 (in German). In: Smog Episodes (G. Von Nieding and K. Jander, Eds.), G. Fischer Verlag;Schmitt 0.;Stuttgart,1986
5. Investigations on mortalitv in North-rhine Westfalia during the inversion-weather situation in December 1962;Steiger H.;Staub-Rein. Luft,1971