Interactive 3-D graphics workstations in stereotaxy: clinical requirements, algorithms, and solutions. - Hans-Heino Ehricke; Gerhard Daiber; Ralf Sonntag; Wolfgang Straßer; Mathias Lochner; Lothar Rudi Schad; Walter Josef Lorenz (VBC, 1992)

The Vision Camera: An Interactive Tool for Volume Data Exploration and Navigation. - Hans-Heino Ehricke; Gerhard Daiber; Wolfgang Straßer (IEEE Visualization, 1993)