1. J.C. Choi, S.H. Kong, Jpn. J. Appl. Phys. 48, 06FG05 (2009)
2. J.C. Choi, S.H. Kong, Jpn. J. Appl. Phys. 49, 06GN15 (2010)
3. S. Habibi, S.J. Cooper, J.M. Stauffer, B. Dutoit, in Position, Location and Navigation Symposium, 2008 IEEE/ION (2008), pp. 232–237
4. A. Lombardi, M. Ferri, G. Rescio, M. Grassi, P. Malcovati, in Proceedings of the IEEE Sensor (2009), pp. 1967–1970
5. R. Xu, S. Zhou, W.J. Li, IEEE Sens. J. 12, 1166–1173 (2012)