@ARTICLE {27733,
author={F.  Pereira and R.  Correia and N.B.C. Carvalho},
doi={10.3390/s17102268},
journal={Sensors},
title={Passive Sensors for Long Duration Internet of Things Networks},
year={2017},
month={October},
volume={17},
number={10},
pages={2268-2268},
ISSN={1424-3210}
}