Topics in Modal Analysis I, Volume 5 Proceedings of the 30th IMAC, A Conference on Structural Dynamics, 2012 - Allemang, R.; Allemang, R.; De Clerck, J.; De Clerck, J.; Niezrecki, C.; Niezrecki, C.; Blough, J.R.; Blough, J.R. (Springer New York : Imprint: Springer, 2012)