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\bibitem{Gonzalez_etal2004} Gonz{\'a}lez, F. J., Alda, J., Ilic, B., \& Boreman, G. D. (2004). Infrared Antennas Coupled to Lithographic Fresnel Zone Plate Lenses. \textit{Appl. Opt.}, \textit{43}(33), 6067--6073.

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