@article{pachas_paredes_beltran_2022,  title={Derivation of the equations of motion and boundary conditions of a thin plate via the variational method},  volume={44},  ISSN={1806-1117},  url={https://doi.org/10.1590/1806-9126-RBEF-2021-0387},  DOI={10.1590/1806-9126-RBEF-2021-0387},  journal={Revista Brasileira de Ensino de Física},  publisher={Sociedade Brasileira de Física - SBF},  author={Pachas, V. S. and Paredes, A. D. and Beltran, J.},  year={2022},  pages={e20210387} }