@ARTICLE {3185,
author={Silveirinha, M. and Fernandes, C. A. and Costa, J.R. and Medeiros, C. R. },
journal={Applied Physics Letters},
title={Experimental Demonstration of a Structured Material with Extreme Effective Parameters at Microwaves},
year={2008},
month={October},
volume={93},
number={174103},
pages={1-3},
ISSN={0003-6951},
}