@article{heyck_1962,  title={Enxaqueca},  volume={20},  ISSN={0004-282X},  url={https://doi.org/10.1590/S0004-282X1962000300003},  DOI={10.1590/S0004-282X1962000300003},  number={3},  journal={Arquivos de Neuro-Psiquiatria},  publisher={Academia Brasileira de Neurologia - ABNEURO},  author={Heyck, Hartwig},  year={1962},  month={Sep},  pages={200–211} }