Ahmed, B. T., and M. C. Ramon,  "On the Impact of Ultra-Wideband (UWB) on Macrocell Downlink of UMTS and CDMA-450 Systems",  Electromagnetic Compatibility, IEEE Transactions on, vol. 50, no. 2, pp. 406-412, May, 2008.

Ahmed, B. T., M. C. Ramon, and L. H. Ariet,  "On the UMTS-HSDPA in High Altitude Platforms (HAPs) Communications",  Wireless Communication Systems, 2006. ISWCS '06. 3rd International Symposium on, pp. 704-708, Sept, 2006.