Multi-epoch observations with high spatial resolution of multiple T Tauri systems Gergely Csépány, Mario van den Ancker, Péter Ábrahám, Rainer Köhler, Wolfgang Brandner, Felix Hormuth and Hector Hiss A&A, 603 (2017) A74 Published online: 10 July 2017 DOI: 10.1051/0004-6361/201527494