@article{selim_2010,  title={Torsional vibration of carbon nanotubes under initial compression stress},  volume={40},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332010000300004},  DOI={10.1590/S0103-97332010000300004},  number={3},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Selim, M.M.},  year={2010},  month={Sep},  pages={283–287} }