@article{nunes_lameiras_2005,  title={The optical absorption of gamma irradiated and heat-treated natural quartz},  volume={8},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392005000300014},  DOI={10.1590/S1516-14392005000300014},  number={3},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Nunes, Eduardo Henrique Martins and Lameiras, Fernando Soares},  year={2005},  month={Jul},  pages={305–308} }