Tuning

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Subramanyam, G, F.W Van Keuls, F.A Miranda, C.L Canedy, S Aggarwal, T Venkatesan, and Ramamoorthy Ramesh. "Correlation of electric field and critical design parameters for ferroelectric tunable microwave filters." Integrated Ferroelectrics. Vol. 24. Gordon & Breach Science Publ Inc, Newark, 1999. 273–285.

Williams, Alison A, Barbara A Atkinson, Karina Garbesi, Erik Page, and Francis M Rubinstein. "Lighting Controls in Commercial Buildings." Leukos: The Journal of the Illuminating Engineering Society of North America 8.3 (2012) 19.