Improved Ray Casting of Procedural Distance Bounds. - Benjamin Keinert; Henry Schäfer; Johann Korndörfer; Urs Ganse; Marc Stamminger (J. Graph. Tools, 2013)

Enhanced Sphere Tracing. - Benjamin Keinert; Henry Schäfer; Johann Korndörfer; Urs Ganse; Marc Stamminger (STAG, 2014)

The iray light transport simulation and rendering system. - Alexander Keller 001; Carsten Wächter; Matthias Raab; Daniel Seibert; Dietger van Antwerpen; Johann Korndörfer; Lutz Kettner (SIGGRAPH Talks, 2017)