@article{nassar_bassalo_alencar_lopes_oliveira_cattani_2002,  title={The linear potential propagator via wave function expansion},  volume={32},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332002000400024},  DOI={10.1590/S0103-97332002000400024},  number={3},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Nassar, Antônio B. and Bassalo, José M. F. and Alencar, Paulo T. S. and Lopes, José L. M. and Oliveira, José I. F. de and Cattani, Mauro S. D.},  year={2002},  month={Sep},  pages={812–814} }