Gaşpar, Păstorel http://orcid.org/0000-0002-6719-2276
Funding for this research was provided by:
European Regional Development Fund (POC-A.1.1.4-E-2015 NR.30/01.09.2016)
Article History
Received: 19 December 2017
Revised: 8 October 2018
First Online: 7 December 2018