Robert R. Lewis

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Jin, Shuangshuang, Lewis, Robert R., West, David (2005): A comparison of algorithms for vertex normal computation. In The Visual Computer, 21 (1) pp. 71-82.

Cochran, Wayne O., Lewis, Robert R., Hart, John C. (2001): The normal of a fractal surface. In The Visual Computer, 17 (4) pp. 209-218.

Lewis, Robert R., Fournier, Alain (2000): Wavelet Radiative Transfer and Surface Interaction. In Comput. Graph. Forum, 19 (2) pp. 135-151.

Lewis, Robert R. (1994): Making Shaders More Physically Plausible. In Comput. Graph. Forum, 13 (2) pp. 109-120.