Bratkova, S.
Alexieva, Z.
Angelov, A.
Nikolova, K.
Genova, P.
Ivanov, R.
Gerginova, M.
Peneva, N.
Beschkov, V.
Funding for this research was provided by:
Bulgarian National Science Fund (DN 07/7, 15.12.2016)
Article History
Received: 19 September 2018
Revised: 7 January 2019
Accepted: 10 January 2019
First Online: 19 January 2019