1. Bendeliani, N.A., Popova, S.V., Vereschagin, L.F.: New modification of titanium dioxide obtained at high pressure. Geochemistry 3, 387?390 (1966)
2. Chang, L.L.Y.: Phase relations in the system PbO-WO3. J. Am. Ceram. Soc. 54, 357?358 (1971)
3. Dachille, F., Glasser, L.S.D.: High pressure forms of BPO4 and BAsO4; quartz analogues. Acta Crystallogr. 12, 820?821 (1959)
4. Fujita, T., Yamaoka, S., Fukunaga, O.: Pressure induced phase transformation in BaWO4. Mater. Res. Bull. 9, 141?146 (1974)
5. Kanamaru, F., Shimada, M., Koizumi, M., Asai, T.: Allotropic transformation of FeVO4 under high pressure. In: Proceedings of the Fourth International Conference on High Pressure, Kyoto, Physico-chemical Society of Japan, 1974, pp. 180?184