Study of new rubber to steel adhesive systems based on Co(II) and Cu(II) sulphides coatsIvan Labaj, Darina Ondrušová, Andrej Dubec, Mariana Pajtášová, Marcel Kohutiar and Beata PecušováMATEC Web Conf., 157 (2018) 07004DOI: https://doi.org/10.1051/matecconf/201815707004