Morgado, T., Alves, J. M., Marcos, J., Maslovski, S., Costa, J. R., Fernandes, C. A...Silveirinha, M. G. (2014). Spatially Confined UHF RFID Detection With a Metamaterial Grid. IEEE Transactions on Antennas and Propagation, 62(1), 378?384. https://doi.org/10.1109/TAP.2013.2287027