1. ‘International Radio Consultative Committee (CCIR): ‘Influence of terrain irregularities and vegetation on tropospheric propagation’’, 1990
2. ‘A transport theory of millimetre wave propagation in woods and forests’, US Army CECOM, Fort Monmouth, NJ, 1985
3. Ishimaru, A.: Wave propagation and scattering in random media, (Academic Press, New York 1978),1, Chap. 7,