Backe, Hans-Joachim: The Aesthetics of Non-Euclidean Game Spaces: Multistability and Object Permanence in "Antichamber" and "P.T.", in Bonner, Marc (Hrsg.): Game | World | Architectonics: Transdisciplinary Approaches on Structures and Mechanics, Levels and Spaces, Aesthetics and Perception, Heidelberg: Heidelberg University Publishing, 2021, S. 153–167. https://doi.org/10.17885/heiup.752.c10385