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Heo, Sejong; Shin, Ok Shik; Park, Chan Gook
International Journal of Aeronautical & Space Sciences, Vol. 11, No. 1, 2010, pp. 31-40
신옥식; 허세종; 박찬국
한국항공우주학회지, 제38권, 제7호, 2010, pp. 693-701