O. Mattausch, D Scherzer, M. Wimmer:
"Temporal Screen-Space Ambient Occlusion";
in: "Temporal Screen-Space Ambient Occlusion", Association of Symbolic Logic, A K Peters, Ltd., 2011, ISBN: 978-1568817187, 123 - 142.
ambient occlusion
http://publik.tuwien.ac.at/files/PubDat_200721.pdf