1. Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables,1972
2. On orthogonal polynomials of Sobolev type: algebraic properties and zeros;Alfaro;SIAM J. Math. Anal.,1992
3. Asymptotics for the Christoffel function for Jacobi like weights on a ball in Rm;Bos;New Zealand J. Math.,1994
4. Orthogonal Polynomials of Several Variables;Dunkl,2001
5. On recurrence relations for Sobolev polynomials;Evans;SIAM J. Math. Anal.,1995