@article{librelon_jorge_2001,  title={Gaussian Basis Sets for the Calculation of Some States of the Lanthanides},  volume={31},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332001000200027},  DOI={10.1590/S0103-97332001000200027},  number={2},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Librelon, P.R. and Jorge, F.E.},  year={2001},  month={Jun},  pages={322–326} }