Ahmed, B. T.,  "W-CDMA multi-service uplink capacity and interference statistics of a long-tunnel cigar-shaped microcells",  Communications, IET, vol. 1, no. 4, pp. 726-731, August, 2007.

Ahmed, B. T.,  "On High Altitude Platforms (HAPs) UMTS-HSDPA",  Wireless Technology, 2006. The 9th European Conference on, pp. 223-226, Sept, 2006.

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.

Taha-Ahmed, B., M. Calvo-Ramon, and L. de Haro-Ariet,  "W-CDMA uplink capacity and interference statistics of a long tunnel cigar-shaped microcells",  Communications and Networks, Journal of, vol. 6, no. 2, pp. 106-111, June, 2004.