1. B. Aurivillius, Mixed Bismuth Oxides with Layer Lattices: II. Structure Type of Bi4Ti3O12, Arkiv. Kemi. 1(58), 499 – 512 (1949).
2. B. Aurivillius, Mixed Bismuth Oxides with Layer Lattices: III. Structure Type of BaBi4Ti4O15, Arkiv. Kemi. 2(37), 512 – 527 (1950).
3. G. A. Smolenskii, V. A. Isupov, A. I. Agranovskaya, New ferroelectric PbBi2Nb2O9, Solid State Physics, 1, 1969 (1959).
4. B. Aurivillius, Ferroelectricity in the compound BaBi4Ti5O18, Phys. Rev. 126, 893 – 897 (1962).
5. E. C. Subbarao, Crystal chemistry of mixed bismuth oxides with layer-type structure, J. Am. Ceram. Soc., 45, 166 (1962).