@article{vanhecke_sigaud_silva_2009,  title={Modified symplectic structures in cotangent bundles of lie groups},  volume={39},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332009000100003},  DOI={10.1590/S0103-97332009000100003},  number={1},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Vanhecke, F.J. and Sigaud, C. and Silva, A.R. da},  year={2009},  month={Mar},  pages={18–24} }