Grabchev, Ivo
Staneva, Desislava
Vasileva-Tonkova, Evgenia
Alexandrova, Radostina
Cangiotti, Michela
Fattori, Alberto
Ottaviani, Maria Francesca
Funding for this research was provided by:
National Science Fund, Ministry of Education and Science of Bulgaria (DFNI H09/03-2016, DFNI Б 02/30)