The importance of ocular artifact removal in single-trial ERP analysis : the case of the N250 in face learning / Kotowski Krzysztof, Ochab Jeremi , Stapor Katarzyna, Sommer Werner // Biomedical Signal Processing and Control. - 2023 vol. 79 no. Part 1. - ISSN 1746-8094. - eISSN 1746-8108