Boyvalenkov, Peter
Stoyanova, Maya http://orcid.org/0000-0002-8813-3398
Funding for this research was provided by:
Bulgarian National Science Fund (KP-06-N32/2-2019)
Bulgarian National Science Fund (the National Scientific Program “Information and Communication Technologies for a Single Digital Market in Science, Education and Security (ICTinSES)”)
Bulgarian National Science Fund (NIS-3317, financed by the Bulgarian Ministry of Education and Science)
Article History
Received: 9 July 2020
Accepted: 25 March 2021
First Online: 16 April 2021
Declarations
:
: The authors declare that they have no conflict of interest.