Orientation Contrast Detection in Space-Variant Images. - Gregory Baratoff; Ralph Schönfelder; Ingo Ahrns; Heiko Neumann (Biologically Motivated Computer Vision, 2000)

The Planar: A Mobile VR Tool with Pragmatic Pose Estimation for Generation and Manipulation of 3D Data in Industrial Environments. - Ralph Schönfelder; Joachim Baur; Frank Spenling (3DIM, 2005)

Virtual reality aided assembly with directional vibro-tactile feedback. - Holger Regenbrecht; Jörg Hauber; Ralph Schönfelder; Andreas Maegerlein (GRAPHITE, 2005)

The Planar: An Interdisciplinary Approach to a VR Enabled Tool for Generation and Manipulation of 3D Data in Industrial Environments. - Ralph Schönfelder; Frank Spenling (VR, 2005)

UX als Chance für Mixed Reality - Konzepte der Spieleindustrie in der Digitalen Fabrikplanung. - Fabian Scheer; Karl-Josef Wack; Henning Brau; Ralph Schönfelder (UP, 2010)