1. Hopf Algebras;Abe,1977
2. The history of Blissard's symbolic method, with a sketch of its inventor's life;Bell;Amer. Math. Monthly,1938
3. What is the natural generalization of a Bézier curve?;Barry,1989
4. Advanced Combinatorics;Comtet,1974
5. Curves and Surfaces for Computer Aided Geometric Design: A Practical Guide;Farin,1988