Validation of the g.tec Unicorn Hybrid Black wireless EEG system: https://onlinelibrary.wiley.com/doi/full/10.1111/psyp.14320 other papers which use the Unicorn Black: https://scholar.google.com/scholar?hl=de&as_sdt=0%2C5&q=unicorn+black+eeg&oq=unicorn+black