@article{wartenberg_1952,  title={Early diagnosis of parkinson},  volume={10},  ISSN={0004-282X},  url={https://doi.org/10.1590/S0004-282X1952000200004},  DOI={10.1590/S0004-282X1952000200004},  number={2},  journal={Arquivos de Neuro-Psiquiatria},  publisher={Academia Brasileira de Neurologia - ABNEURO},  author={Wartenberg, Robert},  year={1952},  month={Apr},  pages={139–146} }