@article{sfreddo_guerra_2012,  title={Ligamentum flavum hematoma: a case report and literature review},  volume={11},  ISSN={1808-1851},  url={https://doi.org/10.1590/S1808-18512012000100016},  DOI={10.1590/S1808-18512012000100016},  number={1},  journal={Coluna/Columna},  publisher={Sociedade Brasileira de Coluna},  author={Sfreddo, Ericson and Guerra, Marcelo Teodoro Ezequiel},  year={2012},  pages={81–83} }