1. B. Bisceglia, “Symbolic Code Approach to GTD Ray Tracing” IEEE Transactions on Antennas and Propagation, Vol. 36, No. 10, pp. 1492–1495, Oct. 1988.
2. K.A. Chamberlin, et al, “An evaluation of Longley-Rice and GTD propagation models”, IEEE trans, on ant. & prop., Nov 1982.
3. ETSI-SMG Technical Specification, “European digital cellular telecommunication system (phase 2: Radio network planning aspects”, ETSI-SMG GSM 03.30 version 4.1.0, January 1993.
4. M. Hata, “Emperical Formula for Propagation Loss in Land Mobile Radio Services,” IEEE Transactions on Vehicular Technology, Vol. VT-29, No. 3, pp. 213–225, August 1979.
5. F. Ikegami, et. al., “Propagation factors controlling mean field strength on urban streets,” IEEE Transactions on Antennas and Propagation, Vol. AP-32, No. 8, pp. 822–829, Aug. 1984.