Náprstek, J., Pospíšil, S. Modal Analysis of Damaged Structure by Means of Transform of the Hilbert Type. In: CARLOMAGNO, G. M., BREBBIA, C. A., eds. Computational Methods and Experimental Measurements. Boston: Witpress, 1999, s. 429-442. ISBN 1 85312683 7. ISSN 1369-734X.