1. CLENSHAW, C W. The solution of van der Pol's equation in Chebyshev series. Numerical solution of nonlinear differential equations. edited by D Greenspan, New York, John Wiley and Sons, 1966, 55–63.
2. FERRISS, D H. A numerical determination of the bending of thin conical shells under normal loading. NPL NAC Report No 63, 1976.
3. PICKEN, S M. Algorithms for the solution of differential equations in Chebyshev series by the selected points method. NPL Maths Report No 94, 1970.