Lethert, C. (2009). Matrix, notations ; Jorinde Voigt ; Lemniscate, acoustic cluster (multi-channel audio installation) by Patric Catani & Chris Imler (composition) in cooperation with Jordine Voigt (concept) ; conceptional drawing and acoustic swarm: Galerie Christian Lethert. Publ. catalogue: Christian Lethert ; Jorinde Voigt. Kerber.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lethert, Christian. Matrix, Notations ; Jorinde Voigt ; Lemniscate, Acoustic Cluster (multi-channel Audio Installation) by Patric Catani & Chris Imler (composition) in Cooperation with Jordine Voigt (concept) ; Conceptional Drawing and Acoustic Swarm: Galerie Christian Lethert. Publ. Catalogue: Christian Lethert ; Jorinde Voigt. Bielefeld [u.a.]: Kerber, 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Lethert, Christian. Matrix, Notations ; Jorinde Voigt ; Lemniscate, Acoustic Cluster (multi-channel Audio Installation) by Patric Catani & Chris Imler (composition) in Cooperation with Jordine Voigt (concept) ; Conceptional Drawing and Acoustic Swarm: Galerie Christian Lethert. Publ. Catalogue: Christian Lethert ; Jorinde Voigt. Kerber, 2009.