1. N. Lysek, Sorbents for Gases Desulfurization. Production and Application, OPOLWAP, Tarnów Opolski 1997 (in Polish).
2. J. Kucowski, D. Laudyn and M. Przekwas, Power Industry and the Environment Protection, WNT, Warsaw 1993 (in Polish).
3. J. Warych, Gas Purification, Processes and Equipment, WNT, Warsaw 1998, (in Polish).
4. A. Durych, A. Laszuk and A. Wiechowski, Ochrona powietrza, 3 (1985) 45 (in Polish).
5. W. Brylicki, Pap. Com. Ceram. Sci., Polish Acad. Sci., Cracow Division, Ceramics, 54 (1997) 479 (in Polish).