1. Banerjee JR (2012). Free vibration of beams carrying spring-mass systems: a dynamic stiffness approach. Computers and Structures, 21(26), 104–105.
2. Chang CH (2000). Free vibration of a simply supported beam carrying A rigid mass at the middle. Journal of Sound and Vibration, 237, 733–744.
3. Gurgoze M (1996). On the eigenfrequencies of a cantilever beam with attached tip mass and a spring-mass system. Journal of Sound and Vibration, 190, 149–162.
4. Jiang DZ, Hong M, Zhou L (2011). Study on operational modal parameters identification of ship structures. Journal of Ship Mechanics, 15(3), 313–324.
5. James GH, Carne JPL (1995). The natural excitation technique (NExT) for modal parameter extraction from operating Structures. Journal of Analytical and Experimental Modal Analysis, 10(4), 260–277.