@article{dias_2010,  title={Power secant method applied to natural frequency extraction of Timoshenko beam structures},  volume={7},  ISSN={1679-7825},  url={https://doi.org/10.1590/S1679-78252010000300005},  DOI={10.1590/S1679-78252010000300005},  number={3},  journal={Latin American Journal of Solids and Structures},  publisher={Individual owner},  author={Dias, C.A.N.},  year={2010},  month={Sep},  pages={307–333} }