1. Jaenicke R(1987). In: Fischer G(ed) Landolt-Börnstein; New Series V/4b, vol meteorology, London
2. VDI guideline 2310/part19 (1992) Maximum immission concentrations for suspended particulate matter
3. Lodge JP (1986) AST 5: 459
4. Kiehl JT, Briegleb BP (1993) Science 260: 311
5. Charlson RJ, Schwartz SE, Hales JM, Cess RD, Coakley JA, Hansen JE, Hofmann DJ (1992) Science 255: 423