Mehta, A., Marhic, M. E., Mehta, A., Pal, A., & Marhic, M. (2011). Theory and Generation of Circularly Polarized Waves by Antenna Arrays With <formula formulatype="inline"><tex Notation="TeX">$ {N} $</tex></formula>-Fold Rotational Symmetry. IEEE Antennas and Wireless Propagation Letters, 10, p. 1441. doi:10.1109/lawp.2011.2179280

Mehta, Amit, M. E. Marhic, A. Mehta, A. Pal, and Michel Marhic. "Theory and Generation of Circularly Polarized Waves By Antenna Arrays With $ {N} $-Fold Rotational Symmetry." IEEE Antennas and Wireless Propagation Letters 10 (2011): 1441.

Mehta, Amit, et al. "Theory and Generation of Circularly Polarized Waves By Antenna Arrays With $ {N} $-Fold Rotational Symmetry." IEEE Antennas and Wireless Propagation Letters 10 (2011): 1441.