@article{baldan_serra_emmel_silva_1999,  title={Temperature dependence of the absorption coefficient in doped quantum wells},  volume={29},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97331999000400021},  DOI={10.1590/S0103-97331999000400021},  number={4},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Baldan, M.R. and Serra, R.M. and Emmel, P.D. and Silva, A. Ferreira da},  year={1999},  month={Dec},  pages={723–726} }