TY - JOUR A1 - Schulze, Bert-Wolfgang T1 - On a paper of Krupchyk, Tarkhanov, and Tuomela N2 - We compare the above-mentioned article with the content of a previous publication Y1 - 2009 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/31914 UR - http://www.sciencedirect.com/science/journal/00221236 SN - 0022-1236 ER -