1. Apple. Opengl es programming guide for ios. https://developer.apple.com/library/ios/documentation. Apple. Opengl es programming guide for ios. https://developer.apple.com/library/ios/documentation.
2. Image-space horizon-based ambient occlusion
3. Fast Poisson disk sampling in arbitrary dimensions
4. Chapman J. 2011. Ssao tutorial. Chapman J. 2011. Ssao tutorial.
5. Feldman M. 2015. Adreno rendering tutorial 1: Choosing resolution. Feldman M. 2015. Adreno rendering tutorial 1: Choosing resolution.