@ARTICLE {30116,
author={B Lopes and T.  Ferreira and J. N. Matos},
doi={10.1109/JRFID.2020.3010196},
journal={IEEE Journal of Radio Frequency Identification},
title={Design Guidelines for Gap Coupled Spiral Microstrip Resonators in Chipless RFID Tags},
year={2020},
month={July},
volume={1},
number={1},
pages={1-1},
ISSN={2469-7281}
}
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