1. Aldred, Robert, Peter Hilton, Derek Holton, and Jean Pedersen, Baked Beans and Spaghetti, The Mathematics Educator 5, No. 2 (1994), 35–41.
2. Gould, H.W., Equal products of generalized binomial coefficients, Fibonacci Quarterly
9 (1971), 337–346.
3. Hilton, Peter, Derek Holton, and Jean Pedersen, Mathematical Reflections — In a Room with Many Mirrors, 2nd printing, Springer Verlag NY, 1998.
4. Hilton, Peter, and Jean Pedersen, Extending the binomial coefficients to preserve symmetry and pattern, Computers Math. Applic. 17: 1–3 (1989) 89–102.
5. Hilton, Peter, and Jean Pedersen, Relating geometry and algebra in the Pascal triangle, hexagon, tetrahedron, and cuboctahedron. Part I: Binomial coefficients, extended binomial coefficients and preparation for further work, The College Mathematics Journal, 30, No. 3 (1999), 170–186.