1. L.G. Sillen, Arkiv Kemi. Mion. Geol. 12A (18), 1 (1937); thesis, University of Stockholm (1940); B. Aurivillius and L.G. Sillen. Nature 155, 305 (1945).
2. S.C. Abrahams, P.B. Jamieson, and J.L. Bernstein. J. of Chem. Phys. 47 (10) 4034 (1967).
3. S.C. Abrahams, J.L. Bernstein, and C. Svensson. J. of Chem. Phys. 71, 788 (1979).
4. G.M. Safronov, V.N. Batog, Yu.I. Krassilov, et al. Izvestia AN USSR, Neorg. Materiali (in Russian) 6, n2, 284 (1970).
5. R.E. Aldrich, S.L. Hou, and M.L. Harvill. J. Appl. Phys. 42, 493–494 (1971).