1. H.-G. Franc and J. W. Stadelhofer, Industrial Aromatic Chemistry. Springer-Verlag, Berlin, Heidelberg (1988).
2. R. Dowbenko, in: Kirk-Othmer Encyclopediaof Chemical Technology, 4th edn, J. I. Kroschowitz and M. Houl-Grant (Eds), p. 106. Wiley, New York (1992).
3. J. H. Gilks, J. of Institute of Petroleu m 50, 309 (1964).
4. J. Wrzyszcz and H. Grabowska, Polish J. Chem. Technol. 1, 50 (1999).
5. H. Grabowska, W. Miśta, L. Syper, J. Wrzyszcz and M. Zawadzki, J. Catal. 160, 134 (1996).