@article{brunatto_kühn_muzart_2001,  title={Influence of the radial spacing between cathodes on the surface composition of iron samples sintered by hollow cathode electric discharge},  volume={4},  ISSN={1516-1439},  url={https://doi.org/10.1590/S1516-14392001000400005},  DOI={10.1590/S1516-14392001000400005},  number={4},  journal={Materials Research},  publisher={ABM, ABC, ABPol},  author={Brunatto, S.F. and Kühn, I. and Muzart, J.L.R.},  year={2001},  month={Oct},  pages={245–250} }