@article{de luca_2008,  title={Strongly coupled overdamped pendulums},  volume={30},  ISSN={1806-1117},  url={https://doi.org/10.1590/S1806-11172008000400004},  DOI={10.1590/S1806-11172008000400004},  number={4},  journal={Revista Brasileira de Ensino de Física},  publisher={Sociedade Brasileira de Física - SBF},  author={De Luca, R.},  year={2008},  month={Oct},  pages={4304.1–4304.4} }