1. Abbott, D., Zhang, X.-C.: Scanning the issue: T-ray imaging, sensing, and retection. Proc. IEEE 95, 1509–1513 (2007). https://doi.org/10.1109/JPROC.2007.900894
2. Atakaramians, S., Shahraam Afshar, V., Monro, T.M., Abbott, D.: Terahertz dielectric waveguides. Adv. Opt. Photonics 5, 169–215 (2013). https://doi.org/10.1364/aop.5.000169
3. Blinc, R., Žekš, B.: Soft Modes in Ferroelectrics and Antiferroelectrics. North-Holland, Amsterdam (1974)
4. Bloembergen, N.: Nonlinear Optics. W. A. Benjamin Inc, New York (1965)
5. Buzin, I.M., Ivanov, I.V., Belokopytov, G.V., Sychev, G.V., Chuprakov, V.F.: Low-temperature ferroelectrics: dielectric permittivity, losses, and parametric interactions at ultrahigh frequencies. Izv. VUZ Fizika (Sov. Phys. J.) 24(8), 6–27 (1981)