1. J. D. Childress, J. Appl. Phys. 33, 1793 (1962).
2. H. Zhu, S. Pruvost, P. J. Cottinet, and D. Guyomar, Appl. Phys. Lett. 98, 222901 (2011).
3. R. B. Olsen, U.S. Patent No. 4 647 836 “Pyroelectric Energy Converter and Method” (3 March 1987).
4. A. B. Kozyrev and V. N. Osadchii, RF Patent No. 2 350 008, Byull. Izobret., No. 8 (2009).
5. A. V. Tumarkin, S. V. Razumov, A. G. Gagarin, and A. B. Kozyrev, in Proceedings of the 33rd European Microwave Conference (EuMC 2003), Munich, Germany, 2003, pp. 325–326.