@article{xavier jr._2001,  title={New method for obtaining complex roots in the semiclassical coherent-state propagator formula},  volume={31},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332001000300018},  DOI={10.1590/S0103-97332001000300018},  number={3},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Xavier Jr., Ademir Luix},  year={2001},  month={Sep},  pages={461–467} }