Time-coded chipless RFID tags: Design, characterization and application. - David Girbau; Antonio Lázaro 001; Angel Ramos (RFID-TA, 2012)

Time-domain UWB RFID tags for smart floor applications. - Angel Ramos; Antonio Lázaro 001; Ramon Maria Villarino; David Girbau (RFID-TA, 2014)

Single-Layer, Flexible, and Depolarizing Chipless RFID Tags. - Angel Ramos; Zeshan Ali; Arnaud Vena; Marco Garbati; Etienne Perret (IEEE Access, 2020)