@article{günther_1999,  title={Selected topics from recent NMR studies of organolithium compounds},  volume={10},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50531999000400002},  DOI={10.1590/S0103-50531999000400002},  number={4},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Günther, Harald},  year={1999},  month={Jul},  pages={241–262} }