@article{rosner_drechsler_fuchs_handstein_wälte_müller_2003,  title={Electronic structure and aspects of unconventional superconductivity in Na xCoO2.yH2O},  volume={33},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97332003000400016},  DOI={10.1590/S0103-97332003000400016},  number={4},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Rosner, H. and Drechsler, S.-L. and Fuchs, G. and Handstein, A. and Wälte, A. and Müller, K.-H.},  year={2003},  month={Dec},  pages={718–722} }