@article{gratton_gnavi_farrugia_bender_2004,  title={On the MHD boundary of Kelvin-Helmholtz stability diagram at large wavelengths},  volume={34},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332004000800053},  DOI={10.1590/S0103-97332004000800053},  number={4b},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Gratton, F. T. and Gnavi, G. and Farrugia, C. J. and Bender, L.},  year={2004},  month={Dec},  pages={1804–1813} }