@article{amaku_coutinho_toyama_2020,  title={The normalization of wave functions of the continuous spectrum},  volume={42},  ISSN={1806-1117},  url={https://doi.org/10.1590/1806-9126-RBEF-2019-0099},  DOI={10.1590/1806-9126-RBEF-2019-0099},  journal={Revista Brasileira de Ensino de Física},  publisher={Sociedade Brasileira de Física - SBF},  author={Amaku, M. and Coutinho, F. A. B. and Toyama, F. M.},  year={2020},  pages={e20190099} }