Kubo, Hiroyuki, Yoshinori Dobashi, and Shigeo Morishima. 2011. “Curvature-Dependent Reflectance Function for Interactive Rendering of Subsurface Scattering”. International Journal of Virtual Reality 10 (1):45-51. https://doi.org/10.20870/IJVR.2011.10.1.2801.