@article{simas_valentim_2015,  title={Recent Results on a Generalization of the Laplacian},  volume={16},  ISSN={2179-8451},  url={https://doi.org/10.5540/tema.2015.016.02.0131},  DOI={10.5540/tema.2015.016.02.0131},  number={2},  journal={TEMA (São Carlos)},  publisher={Sociedade Brasileira de Matemática Aplicada e Computacional},  author={SIMAS, A.B. and VALENTIM, F.J.},  year={2015},  month={May},  pages={131–145} }