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.

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 (underground train case)",  Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on, vol. 3, pp. 2231-2235 Vol.3, Sept, 2004.