1. Comenius University in Bratislava , Faculty of Arts, Chair of German, Dutch and Scandinavian Studies, Gondova 2, Bratislava, Slovakia
2. Constantine the Philosopher University , Faculty of Natural Sciences and Informatics, Department of Informatics, Nitra , Slovakia
3. Slovak University of Technology in Bratislava , Faculty of Mechanical Engineering, Institute of Languages, Sport and Social Sciences – Department of Languages and Social Sciences, Bratislava, Slovakia