Danova, Kalina
Motyka, Vaclav
Todorova, Milka
Trendafilova, Antoaneta
Krumova, Sashka
Dobrev, Petre
Andreeva, Tonya
Oreshkova, Tsvetelina
Taneva, Stefka
Evstatieva, Ljuba
Funding for this research was provided by:
Czech Science Foundation (16-14649S)
the Bulgarian-Swiss Research Programme of the Swiss National Scientific Fund and Bulgarian Ministry of Education (BSRP, grant No. IZEBZ0_142989; DO2-1153)
Joint Scientific Research Project between the CAS and BAS (Reg. num 17-17)