1. G. H. Haertling, “Hot-pressed Lead Zirconate-Lead Titanate Ceramics Containing Bismuth,” Am. Ceram. Soc. Bull, Vol. 43, 875–879, Dec. 1964.
2. G. H. Haertling and W. J. Zimmer, “An Analysis of Hot-pressing Parameters for Lead Zirconate Lead Titanate Ceramics Containing Two Atom Percent Bismuth,” Am. Ceram. Soc. Bull, Vol 45, 1084–1089, Dec. 1966.
3. G. H. Haertling, “Hot-pressed Ferroelectric Lead Zirconate Titanate Ceramics for Electro-optical Applications,” Am. Ceram. Soc. Bull, Vol. 49, 564–567, June 1970.
4. C. E. Land and P. D. Thacher, “Ferroelectric Ceramic Electrooptic Materials and Devices,” Proc. IEEE, Vol. 57, 751–768, May 1969.
5. P. D. Thacher and C. E. Land, “Ferroelectric Electrooptic Ceramics With Reduced Scattering,” IEEE Trans, on Electron Devices, Vol. ED-16, 515–521, June 1969.