1.
Lee I-W, Jung H-J, Kim M-C. Efficient free vibration analysis of large structures with close or ultiple natural frequencies. Part II: Damped structures. CAMES [Internet]. 2023 May 22 [cited 2025 Jan. 12];6(3-4):415-24. Available from: https://cames3.ippt.pan.pl/index.php/cames/article/view/1301