@article{rivarola_scanavacca_2017,  title={Cardiac Autonomic Modulation - The Search for an Ultimate Technique},  volume={109},  ISSN={0066-782X},  url={https://doi.org/10.5935/abc.20170166},  DOI={10.5935/abc.20170166},  number={5},  journal={Arquivos Brasileiros de Cardiologia},  publisher={Sociedade Brasileira de Cardiologia - SBC},  author={Rivarola, Esteban and Scanavacca, Mauricio},  year={2017},  month={Nov},  pages={384–386} }