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한국음향학회 2011년 추계학술대회, pp.494 - 495, 2011
Symposium on Ultrasonic Electronics 2011, pp.287 - 288, 2011
Symposium on Ultrasonic Electronics 2011, pp.121 - 122, 2011
JAPANESE JOURNAL OF APPLIED PHYSICS, v.50, no.7, 2011