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Bibliography

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J. C. Burkill, Polynomial approximations to functions with bounded differences, J. London Math. Soc. vol. 33 (1958) pp. 157-161. MR 0098942 (20:5388)

[2]

F. John, 1958 (unpublished).

[3]

H. Whitney, Derivatives, difference quotients and Taylor's formula, Bull. Amer. Math. Soc. vol. 40 (1934) pp. 89-94. MR 1562803

[4]

-, On functions with bounded nth differences, J. Math. Pures Appl. (9) vol. 36 (1957) pp. 67-95. MR 0084611 (18:889f)