[5] Balanis CA. Antenna Theory: Analysis and Design (Harper & Row, New York, 1982).
[29] Harutyunyan H, Volpe G, Novotny L. Nonlinear optical antennas. Agio M, Alù A. Optical Antennas 131–143 (Cambridge University Press, New York, 2013).
[60] Novotny L, Hecht B. Principles of Nano-Optics 2nd ed (Cambridge University Press, Cambridge, 2012).