E. Murad and U. Schwertmann, Clay Minerals18 (1983) 301.
A. Govaert, C. Dauwe, P. Plinke, E. De Grave and J. De Sitter, J. Physique Colloq37 (1976) C6–825.
F. van der Woude and A.J. Dekker, Phys. Status Solidi13 (1966) 181.
J.B. Forsyth, I.G. Hedley and C.E. Johnson, J. Phys. C. Ser. 21 (1968) 179.
E. De Grave, R. Vanleerberghe, L. Verdonck and G. De Geyter, Phys. Chem. Minerals11 (1984) 85.
D.D. Amarasiriwardena, E. De Grave, L.H. Bowen and S.B. Weed, Clays & Clay Minerals (in press).
R. Kubo, Phys. Rev.87 (1952) 568.
E. Callen and H.B. Callen, J. Appl. Phys.36 (1965) 1140.
R.V. Pound and G.A. Rebka Jr., Phys. Rev. Letters4 (1960) 274.
E. De Grave, A.E. Verbeeck and D.G. Chambaere, Phys. Letters107A (1985) 181.