Fei-Peng's paper presented in APMC 2019, Singapore, Dec. 2019
F.-P. Lai and Y.-S. Chen, “Hybrid encoding of chipless radiofrequency identification at the 2.4-GHz unlicensed band,” 2019 Asia-Pacific Microwave Conference (APMC 2019), Singapore, Dec. 2019, pp. 1‒3.