Thomas Kerwin Han-Wei Shen Don Stredney Enhancing Realism of Wet Surfaces in Temporal Bone Surgical Simulation. 747-758 2009 15 IEEE Trans. Vis. Comput. Graph. 5 http://dx.doi.org/10.1109/TVCG.2009.31 db/journals/tvcg/tvcg15.html#KerwinSS09