Libertín, Milan
Kvaček, Jiří http://orcid.org/0000-0003-2001-121X
Bek, Jiří
Žárský, Viktor http://orcid.org/0000-0002-5301-0339
Štorch, Petr
Article History
Received: 7 September 2017
Accepted: 28 March 2018
First Online: 30 April 2018
Competing interests
: The authors declare no competing interests.