Upplýsingar frá listasamtökum (staðfest af Operabase)
150 Years Bulgarian Academy of Sciences by Vladigerov, P., Cherkin, Stainov, Stoyanov, Dinicu, G., lau 12 okt 2019, Frá (2019/2019), Hljómsveitarstjóri Nayden Todorov, The National Palace of Culture - Congress Centre Sofia (NDK), Sofia, Bulgaria