Tavitian, Yoana
Yancheva, Denitsa Y.
Todorov, Neno D.
Funding for this research was provided by:
Ministry of Culture, Bulgaria (RD11-06-52/26.06.2019)
National Science Fund of Bulgaria (KP-06-OPR 05/5)
Bulgarian Ministry of Education and Science
Article History
Received: 5 November 2020
Accepted: 24 June 2021
First Online: 8 July 2021