1. G. A. Smolenskii, V. A. Isupov, A. I. Agranovskaya and S. N. Popov: Sov. Phys:-Solid State 2, 2584 (1961)
2. Liquid phase sintered BaTiO3
3. B. E. Walker, Jr., R. W. Rice R. C. Pohanka and J. P. Spann: Am. Ceram. Soc. Bull. 55, 274,(1976).
4. Pb. Min, H. U. Anderson and C. C. Hodgkins: US Patent 4082906, April 1978.
5. STABILITY OF LEAD GLASSES AND POLARIZATION OF IONS*