D. Kravtsov, O. Fryazinov, V. Adzhiev, A. Pasko, P. Comninos, “Embedded Implicit Stand-Ins for Animated Meshes: A Case of Hybrid Modelling”, Computer Graphics Forum Volume 29, Issue 1, pages 128–140, March 2010 PDF (preprint)

See also A GPU Pro book chapter on the GPU implementation.