Light-Path Camera Ray Eevee - Blender Development Discussion - Blender Artists Community
Light Path Node - YouTube
Cycles Light Path Magic - Blender Conference 2015
How the light path node works in Blender - Artisticrender.com
Verge3D for Blender: Shader Nodes Reference — Soft8Soft
Simulating Subsurface Scattering in Cycles using the Ray Length output in the Light Path node - Blender Cycles: Materials and Textures Cookbook - Third Edition [Book]
Small Blender Things: How to set up simple hdri environment lighting in Blender Cycles
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Tutorial - Cycles "Light Paths" — a-sh: architekt Štěpán Havlík
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Using Blender's Light Path Node for Cycles - YouTube
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cycles render engine - How to disconnect a light path node - Blender Stack Exchange