Tariq, N., Riaz, M., Shahid, H., Khan, M.J., Khan, M.S., Amin, Yasar, Loo, Jonathan ORCID: https://orcid.org/0000-0002-2197-8126 and Tenhunen, H. (2019) Orientation independent chipless RFID tag using novel trefoil resonators. IEEE Access, 7. pp. 122398-122407.