@article{silva_bertoríni_lemmi_1991,  title={Polysomnography in idiopathic muscle pain syndrome (fibrositis)},  volume={49},  ISSN={0004-282X},  url={https://doi.org/10.1590/S0004-282X1991000400012},  DOI={10.1590/S0004-282X1991000400012},  number={4},  journal={Arquivos de Neuro-Psiquiatria},  publisher={Academia Brasileira de Neurologia - ABNEURO},  author={Silva, A. B. and Bertoríni, T. E. and Lemmi, H.},  year={1991},  month={Dec},  pages={437–441} }