Academic Paper References About Polygon Reduction

The core of the polygon reduction algorithm is based on the technique described by Michael Garland in his Ph.D. thesis, Quadric-Based Polygonal Surface Simplification, available at

http://graphics.cs.uiuc.edu/~garland/research.html
http://www.cs.cmu.edu/~garland

Michael Garland and Paul S. Heckbert: "Surface Simplification Using Quadric Error Metrics", SIGGRAPH 97, and "Simplifying Surfaces with Color and Texture using Quadric Error Metrics", IEEE Visualization 98.

Hugues Hoppe extended the Garland-Heckbert technique as described in "New quadric metric for simplifying meshes with appearance attributes" and "Efficient minimization of new quadric metric for simplifying meshes with appearance attributes". http://research.microsoft.com/~hhoppe