@article{kellner_2010,  title={The effect of stress on sleep quality in teenagers, the analysis of metal contamination due to heaps of steel-slag accumulation in southern Madrid (Spain), and a review of the mechanisms of glutamine action during severe illnesses},  volume={82},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652010000200001},  DOI={10.1590/S0001-37652010000200001},  number={2},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={Kellner, Alexander W. A.},  year={2010},  month={Jun},  pages={261–262} }