Tonchev, Krasimir
Velchev, Yuliyan
Koleva, Pavlina https://orcid.org/0000-0002-8724-1258
Manolova, Agata https://orcid.org/0000-0002-8120-363X
Balabanov, Georgi https://orcid.org/0000-0003-1420-9924
Poulkov, Vladimir https://orcid.org/0000-0003-3226-5639