Velinova, Ralitsa http://orcid.org/0000-0001-9732-050X
Grahovski, Bozhidar
Kolev, Hristo
Ivanov, Georgi
Todorova, Silviya
Naydenov, Anton
Funding for this research was provided by:
Bulgarian Ministry of Education and Science (Д01-272/02.10.2020)
Bulgarian National Science Fund (КП-06-Н49/4)
Article History
Received: 28 September 2021
Accepted: 6 December 2021
First Online: 11 January 2022
Declarations
:
: The authors declare that they have no conflict of interest.