Zaporozhets, O.     Nobel - tool for noise sprectra assessment around the aircraft with account of ground and shielding affects on noise propagation [Текст] / O. Zaporozhets, V. Tokarev, E. Konovalova // Proceedings of the Second World Congress "Aviation in the X X I-st Century" "Safety in Aviation", September 19-21, 2005 / International Civil Aviation Organization; Ministry of Education and Science of Ukraine; National Academy of Sciences of Ukraine; National Aviation University. — Kyiv : NAU, 2005. — P. 4.17-4.20 : іл.