Informazzjoni minn organizzazzjoni tal-arti (Verifikat minn Operabase)
The Bat by Strauss II, Ħad 28 Diċ 2014, Minn (2014/2014), Immexxi minn Dmitry Bertman,, Surmast Direttur Mstislav Rostropovich, Valery Kiryanov, Helikon in Nikitskaya, Moscow, Russia