@article{Wong_2020, title={Spatial Filtering in SSVEP-Based BCIs: Unified Framework and New Improvements}, volume={67}, ISSN={1558-2531}, url={http://dx.doi.org/10.1109/TBME.2020.2975552}, DOI={10.1109/tbme.2020.2975552}, number={11}, journal={IEEE Transactions on Biomedical Engineering}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Wong, Chi Man and Wang, Boyu and Wang, Ze and Lao, Ka Fai and Rosa, Agostinho and Wan, Feng}, year={2020}, month=Nov, pages={3057--3072} }