Pintelon, R.; Guillaume, P.; Schoukens, J. (2007). "Uncertainty calculation in (operational) modal analysis". Mechanical Systems and Signal Processing. 21 (6): 2359–2373. Bibcode:2007MSSP...21.2359P. doi:10.1016/j.ymssp.2006.11.007.
Pintelon, R.; Guillaume, P.; Schoukens, J. (2007). "Uncertainty calculation in (operational) modal analysis". Mechanical Systems and Signal Processing. 21 (6): 2359–2373. Bibcode:2007MSSP...21.2359P. doi:10.1016/j.ymssp.2006.11.007.