Arjan Kuijper, Andreas Schwarzkopf, Thomas Kalbe, Chandrajit Bajaj, Stefan Roth and Michael Goesele. (2013). 3D Anisotropic Diffusion on GPUs by Closed-Form Local Tensor Computations. Numerical Mathematics: Theory, Methods and Applications. 6 (1). 72-94. doi:10.4208/nmtma.2013.mssvm04