1. S. J. Gregg and K. S. W. Sing, Adsorption, Surface Area and Porosity, London 1967, Chapter 8.
2. B. V. Deryagin, Acta Physicochim U.R.S.S. 12, (1940) 139; Proc. Intern. Congress Surface Activity, 2 nd, London 1957, Vol II, 112.
3. F. A. Dullien, in S. Modry (Ed.), Proc. Int. Symp. on Pore Structure and Properties of Materials, Prague 1973, Vol. I, C 173.
4. Surface Area Determination;de Boer,1970