1. LIACS, Leiden University, The Netherlands a.kononova@liacs.leidenuniv.nl
2. LIACS, Leiden University, The Netherlands d.l.vermetten@liacs.leidenuniv.nl
3. Department of Computer Science, Swansea University, United Kingdom fabio.caraffini@swansea.ac.uk
4. Department of Computer Science, West University of Timişoara, Romania madalina.mitran96@e-uvt.ro
5. Department of Computer Science, West University of Timişoara, Romania daniela.zaharie@e-uvt.ro