@inproceedings{sugiarto_allison_gräser_2009, 
  title={Optimization Strategy for SSVEP-Based BCI in Spelling Program Application}, 
  DOI={10.1109/iccet.2009.189}, 
  publisher={IEEE}, 
  author={Sugiarto and Allison and Gräser}, 
  year={2009}
  }