1. Baedecker P. A., Reddy, M. M., Reimann K. J., Sciammarella C. A.: 1992,Atmospheric Environment,26b, 147–158.
2. Braun, R. C. and Wilson, M. J. G.: 1970,Atmospheric Environment,4, 371–378.
3. Edney, E. O., Stiles, D. C., Spence, J. W., Haynie, F. H., Wilson, W. E.: 1986,Atmospheric Environment,20, 541–548.
4. Gilardi, E. F.: 1966,Absorption of atmospheric sulfur-dioxide by clay, brick, and other building materials, Ph.D dissertation, Rutgers (University Microfilms) 67–8187.
5. Johansson, L-G., Lindqvist, O., Mangio R. E.: 1988:Durability Building Material,5, 439–449.