@ARTICLE {20193,
author={D. Ferreira and R. F. S. Caldeirinha and I. Cuinas and T.  Fernandes},
doi={10.1049/iet-map.2016.0540},
journal={IET Microwaves, Antennas and Propagation},
title={Tunable square slot FSS EC modelling and optimisation},
year={2017},
month={April},
volume={11},
number={5},
pages={737-742},
ISSN={1751-8725}
}