@ARTICLE {5806,
author={A Alù and A. D. Yaghjian and R. A. Shore and M. G. Silveirinha},
doi={10.1103/PhysRevB.84.054305},
journal={Physical Review B},
title={Causality relations in the homogenization of metamaterials},
year={2011},
month={August},
volume={84},
number={054305},
pages={1-16},
ISSN={2469-9950}
}