Intuitive Virtual Grasping for Non Haptic Environments. - Thomas Ullmann; Jörg Sauer (PG, 2000)

Adaptive Progressive Vertex Tracing for Interactive Reflections. - Thomas Ullmann; Alexander Schmidt; Daniel Beier; Beat D. Brüderlin (Eurographics (Short Presentations), 2001)

Adaptive Progressive Vertex Tracing in Distributed Environments. - Thomas Ullmann; Daniel Beier; Beat D. Brüderlin; Alexander Schmidt (PG, 2001)

Efficient Sampling of Textured Scenes in Vertex Tracing. - Thomas Ullmann; Thomas Preidel; Beat D. Brüderlin (Eurographics (Short Presentations), 2003)

Vertex tracing - interaktives ray tracing durch adaptiv progressives Refinement im Objektraum. - Thomas Ullmann (2003)