@article{lin_chen_li_yang_2012,  title={Effect of impurities on the Raman scattering of 6H-SiC crystals},  volume={15},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392012005000108},  DOI={10.1590/S1516-14392012005000108},  number={6},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Lin, Shenghuang and Chen, Zhiming and Li, Lianbi and Yang, Chen},  year={2012},  month={Nov},  pages={833–836} }