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Sch\'f3ber, Tom\'e1?, Bla?ej Lippay, and Pavel Ne?as. "Possibilities of Countering The Air Threat And Prevention Against It." \i Review of the Air Force Academy\i0  21, no. 2 (2012): 95-101.\par \par Sch\'f3ber, Tom\'e1?, Ivan Koblen, and Stanislav Szabo. "Present and potential security threats posed to civil aviation." \i Incas Bulletin\i0  4, no. 2 (2012): 169-175.\par \par }