Funding for this research was provided by:
Agentúra Ministerstva školstva, vedy, výskumu a športu SR (APVV-14-0637)
European Regional Development Fund (ITMS 26220120006, ITMS 26220120049)
Article History
Received: 26 July 2017
Accepted: 24 January 2018
First Online: 26 February 2018