Informazzjoni minn organizzazzjoni tal-arti (Verifikat minn Operabase)
Perm Music College. Concert Of The Musicaeterna Choir by Bortnyansky, Chesnokov, P., Rachmaninoff, Berezovsky, Maxim, Erb 23 Mar 2016, Minn (2016/2016), Surmast Direttur Valeria Safonova, Perm Tchaikovsky Opera and Ballet Theatre, Perm, Russia