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2. L. N. Trefethen, Approximation theory and approximation practice (SIAM, Philadelphia, 2013).
3. L. N. Trefethen, Spectral Methods in MATLAB, Vol. 10 (SIAM, Philadelphia, 2000).
4. J. P. Boyd, Chebyshev and Fourier Spectral Methods (Dover, New York, 2013).
5. General linear methods