Informazzjoni minn organizzazzjoni tal-arti (Verifikat minn Operabase)
The Mystery of the Stolen Voices by Wulff-Woesten, Erb 23 Mej 2018, Minn (2018/2018), Immexxi minn Tom Quaas,, Surmast Direttur Johannes Wulff-Woesten, Semper Zwei, Dresden, Germany