Authors
Helena Bruncková
Institute of Materials Research, Slovak Academy of Sciences, Kosice, Slovakia
Maria Kaňuchová
Technical University of Kosice, Faculty of Mining, Ecology, Process Control and Geotechnology, Kosice, Slovakia
Hristo Kolev
Institute of Catalysis, Bulgarian Academy of Sciences, Sofia, Bulgaria
Erika Múdra
Institute of Materials Research, Slovak Academy of Sciences, Kosice, Slovakia
Alexandra Kovalčiková
Institute of Materials Research, Slovak Academy of Sciences, Kosice, Slovakia
Ľubomír Medvecký
Institute of Materials Research, Slovak Academy of Sciences, Kosice, Slovakia