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Dedicated to A. M. Ostrowski on his 75th Birthday
This research was supported in part by NSF Grant GP-5553 and AEC Grant AT(11-1)-1702.
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Herbold, R.J., Schultz, M.H. & Varga, R.S. The effect of quadrature errors in the numerical solution of boundary value problems by variational techniques. Aeq. Math. 3, 247–270 (1969). https://doi.org/10.1007/BF01817445
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DOI: https://doi.org/10.1007/BF01817445