1. Caldeirinha, R.F.S.: Radio characterisation of single trees at micro- and millimetre wave frequencies. PhD thesis, University of Glamorgan (2001)
2. Didascalou, D., Younis, M., Wiesbeck, W.: Millimeter-wave scattering and penetration in isolated vegetation structures. IEEE Transasctions on Geoscience and Remote Sensing 38, 2106–2113 (2000)
3. Fernandes, T., Caldeirinha, R., Al-Nuaimi, M., Richter, J.: A discrete RET model for millimeter-wave propagation in isolated tree formations. IEICE Transactions on Communications E88-B(6), 2411–2418 (2005)
4. Fernandes, T., Caldeirinha, R., Al-Nuaimi, M., Richter, J.: A practical method for vegetation scattering function parameter extraction and scaling. In: Loughborough Antennas and Propagation Conference - LAPC, UK, vol. 1, pp. 105–109 (2006)
5. Ishimaru, A.: Wave propagation and scattering in random media. IEEE Press, Los Alamitos (1997)