1. Specificity in physical sorption
2. Fiedler K., Stach H., Schirmer W. (1975) Physical Adsorption, Liblice, CSSR, p. 194, AC, Heyrovsky Institute, Prague.
3. Fiedler K., Stach H., Schirmer W. (1982) Theorie der Adsorption, Akademie–Verlag, Berlin, p. 13.