@article{grubisic_carpes jr_2014,  title={An efficient indoor ray-tracing propagation model with a quasi-3D approach},  volume={13},  ISSN={2179-1074},  url={https://doi.org/10.1590/S2179-10742014000200005},  DOI={10.1590/S2179-10742014000200005},  number={2},  journal={Journal of Microwaves, Optoelectronics and Electromagnetic Applications},  publisher={Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo},  author={Grubisic, Stevan and Carpes Jr, Walter Pereira},  year={2014},  month={Jul},  pages={166–176} }