Tsyntsarski, Boyko http://orcid.org/0000-0002-7014-366X
Toteva, Vesislava B.
Nickolov, Radostin N.
Banchev, Ivan
Stoycheva, Ivanka
Gonsalvesh, Lenia
Petrova, Bilyana
Georgiev, Georgi
Vasileva, Miglena
Budinova, Temenuzhka
Petrov, Nartzislav
Funding for this research was provided by:
European union, European Regional Development Fund, Operational Programme “Science and Education for Smart Growth” (Project BG05M2OP001-1.002-0019)
Article History
Received: 30 January 2019
Accepted: 3 March 2020
First Online: 17 March 2020