Gyulchev, Galin
Kunz, Jutta
Nedkova, Petya
Vetsov, Tsvetan
Yazadjiev, Stoytcho
Funding for this research was provided by:
COST (CA16104, CA16214)
Deutsche Forschungsgemeinschaft (Research Training Group 1620 Models of Gravit)
Bulgarian National Science Fund (DM 18/3, KP-06-H28/7)
Bulgarian National Science Fund (KP-06-H38/2)
Article History
Received: 25 May 2020
Accepted: 19 October 2020
First Online: 3 November 2020