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2. The experimental determination of vibration parameters from time responses;Ibrahim;Shock Vib. Bull.,1976
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4. The natural excitation technique (next) for modal parameter extraction from operating structures;James;Modal Anal.- Int. J. Anal. Exp. Modal Anal.,1995
5. Modal identification of output-only systems using frequency domain decomposition;Brincker;Smart Mater. Struct.,2001