@article{mota_justo_fazzio_2002,  title={Defect centers in a-SiNx: electronic and structural properties},  volume={32},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332002000200055},  DOI={10.1590/S0103-97332002000200055},  number={2a},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Mota, F. de Brito and Justo, J. F. and Fazzio, A.},  year={2002},  month={Jun},  pages={436–438} }