References
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- Drimer , C. 1985 . IMANA Newsl. , 9 : 3
- Todhunter , I. 1921 . Treatise on the Integral Calculus , Macmillan . Art. 51.
- Morris , J. L I. 1983 . Computational Methods in Elementary Numerical Analysis , 229 (J. Wiley) .