Books/Articles
Integrating Augmented Reality Objects into the Real World with Light and Shadows:
https://medium.com/samsung-internet-dev/integrating-augmented-reality-objects-into-the-real-world-with-light-and-shadows-12123e7b1151
Real Time Shadow Mapping for Augmented Reality Photorealistic Rendering:
Real Time Shadow Mapping for Augmented Reality Photorealistic Rendering
A realtime shadow approach for an augmented reality application using shadow volumes:
(PDF) A realtime shadow approach for an augmented reality application using shadow volumes
Overlapping Shadow Rendering for Outdoor Augmented Reality:
Overlapping Shadow Rendering for Outdoor Augmented Reality
Turn Any Surface Into a Touchscreen: