@INCOLLECTION{SamBCI11, author = {Wojciech Samek and Motoaki Kawanabe and Carmen Vidaurre}, title = {Group-wise Stationary Subspace Analysis - A Novel Method for Studying Non-Stationarities}, booktitle = {Proceedings of the 5th International Brain-Computer Interface Conference 2011}, publisher = {Verlag der Technischen Universit{\"a}t Graz}, year = {2011}, editor = {G. R. M{\"u}ller-Putz, R. Scherer, M. Billinger, A. Kreilinger, V. Kaiser, C. Neuper}, address = {Graz}, pages = {16-20}, isbn = {978-3-85125-140-1} }