Anastassova, Neda
Yancheva, Denitsa
Hristova-Avakumova, Nadya
Hadjimitova, Vera
Traykov, Trayko
Aluani, Denitsa
Tzankova, Virginia
Kondeva-Burdina, Magdalena
Article History
Received: 17 July 2019
Revised: 24 December 2019
Accepted: 30 December 2019
First Online: 3 March 2020