@ARTICLE {6780,
author={T. A. Morgado and S. Maslovski  and M. G. Silveirinha},
doi={10.1088/1367-2630/14/6/063002},
journal={New Journal of Physics},
title={Uniaxial indefinite material formed by helical-shaped wires},
year={2012},
month={June},
volume={14},
number={063002},
pages={1-23},
ISSN={1367-2630}
}