Realistic Depth of Field in Postproduction

David Illes and Peter Horvath GPU Pro, 2010.

Practical Post-Process Depth of Field

Earl Hammon, Jr. (Infinity Ward) GPU Gems 3, 2007.

Real-time Depth-of-Field Implemented with a Postprocessing-Only Technique

David Gillham ShaderX5, 2006.

Depth of Field: A Survey of Techniques

Joe Demers (NVIDIA) GPU Gems, 2004.

Advanced Depth of Field

Thorsten Scheuermann (ATI Research) ATI Technology Papers & Presentations (GDC 2004).

Real-Time Depth of Field Simulation

Guennadi Riguer, Natalya Tatarchuk and John Isidoro ShaderX2, 2003.