@article{boukhalfa_2014,  title={Dynamic analysis of a spinning functionally graded material shaft by the p - version of the finite element method},  volume={11},  ISSN={1679-7825},  url={https://doi.org/10.1590/S1679-78252014001100007},  DOI={10.1590/S1679-78252014001100007},  number={11},  journal={Latin American Journal of Solids and Structures},  publisher={Individual owner},  author={Boukhalfa, Abdelkrim},  year={2014},  pages={2018–2038} }