Color Visualization of 2D Segmentations. - Christoph Dalitz; Tobias Bolten; Oliver Christen (GRAPP/IVAPP, 2013)

A wearable indoor locating system based on visual marker recognition for people with visual impairment. - Yu-Chang Huang; Shanq-Jang Ruan; Oliver Christen; Edwin Naroska (GCCE, 2016)

Improving Mobility for the Visually Impaired: A Wearable Indoor Positioning System Based on Visual Markers. - Chih-Wei Lee; Peter Chondro; Shanq-Jang Ruan; Oliver Christen; Edwin Naroska (IEEE Consumer Electron. Mag., 2018)