Determination of head conductivity frequency response in vivo with optimized EIT-EEG. - Juhani Dabek; Konstantina Kalogianni; Edwin Rotgans; Frans C. T. van der Helm; Gert Kwakkel; Erwin E. H. van Wegen; Andreas Daffertshofer; Jan C. de Munck (NeuroImage, 2016)