DescriptionPenrose-dreieck.svg Deutsch: Penrose-Dreieck English: Penrose triangle Date 5 August 2007 Source Own work Author Tobias R. – Metoc Permission...
Attribution-Share Alike 4.0 truetrue English German Entstehung des Penrose-Dreiecks author name string: Mabit1 URL: https://commons.wikimedia.org/wiki/user:Mabit1...
