@article{carlson_wurtz_2013,  title={Optimal design of a set of permanent magnet generators with the same cross-section},  volume={12},  ISSN={2179-1074},  url={https://doi.org/10.1590/S2179-10742013000200035},  DOI={10.1590/S2179-10742013000200035},  number={2},  journal={Journal of Microwaves, Optoelectronics and Electromagnetic Applications},  publisher={Sociedade Brasileira de Microondas e Optoeletrônica e Sociedade Brasileira de Eletromagnetismo},  author={Carlson, Renato and Wurtz, Frederic},  year={2013},  month={Dec},  pages={678–693} }