Analysis and Interpretation of Empirical Data Obtained by BCI Epoc 14+. - George Dimitrov; Oleksandr Mitsa; Galina S. Panayotova; Vasyl Martsenyuk; Inna Dimitrova; Eugenia Kovatcheva; Boyan Jekov; Iva S. Kostadinova (IT&I Workshops, 2021)