Wu, Z., Sevret, P., and Ammann, M. J.,
“Broadband Dual-Plate Monopole Antennas”, in
Antennas and Propagation, 2003. (ICAP 2003). Twelfth International Conference on (Conf. Publ. No. 491), University of Exeter, United Kingdom, 2003, vol. 2, pp. 493-495.
Chen, Z. N., Ammann, M. J., and Chia, M. Y. W.,
“Broadband Square Annular Planar Monopoles”,
Microwave and Optical Technology Letters, vol. 36, no. 6, pp. 449-454, 2003.