@article{rastegin_2026,  title={A concise way to generate expressions for spherical harmonics},  volume={48},  ISSN={1806-1117},  url={https://doi.org/10.1590/1806-9126-RBEF-2025-0476},  DOI={10.1590/1806-9126-RBEF-2025-0476},  journal={Revista Brasileira de Ensino de Física},  publisher={Sociedade Brasileira de Física - SBF},  author={Rastegin, Alexey E.},  year={2026},  pages={e20250476} }