[Gau94]Walter Gautschi. Algorithm 726: ORTHPOL–a package of routines for generating orthogonal polynomials and Gauss-type quadrature rules. ACM Transactions on Mathematical Software (TOMS), 20(1):21–62, mar 1994. doi:10.1145/174603.174605.
[Kop09]David A. Kopriva. Implementing Spectral Methods for Partial Differential Equations. Scientific Computation. Springer Netherlands, Dordrecht, 2009. ISBN 978-90-481-2260-8. doi:10.1007/978-90-481-2261-5.
[Str57]A. H. Stroud. Remarks on the Disposition of Points in Numerical Integration Formulas. Mathematical Tables and Other Aids to Computation, 11(60):257, oct 1957. doi:10.2307/2001945.
[Xiu08]Dongbin Xiu. Numerical integration formulas of degree two. Applied Numerical Mathematics, 58(10):1515–1520, oct 2008. doi:10.1016/j.apnum.2007.09.004.