• [1] H. Heilbronn and E. H. Linfoot, On the imaginary quadratic corpora of class-number one, Quart. J. Math. Oxford Ser. 5 (1934), 293-301.
• [2] D. H. Lehmer, On imaginary quadratic fields whose class number is unity, Bull. Amer. Math. Soc. 39 (1933), 360.
• [3] C. Jordan, Calculus of finite differences, 2nd ed., Chelsea, New York, 1947.
• [4] N. E. Nörlund, Mémoire sur le calcul aux différences finies, Acta Math. 44 (1923), no. 1, 71–212 (French). MR 1555184, http://dx.doi.org/10.1007/BF02403922
• [5] J. F. Steffensen, Interpolation, Chelsea Publishing Co., New York, N. Y., 1950. 2d ed. MR 0036799 (12,164d)
• [6] Table of natural logarithms for arguments between zero and five to sixteen decimal places, National Bureau of Standards Applied Mathematics Series, No. 31, U. S. Government Printing Office, Washington, D. C., 1953. MR 0057608 (15,255d)

Bibliography

[1]

H. Heilbronn and E. H. Linfoot, On the imaginary quadratic corpora of class-number one, Quart. J. Math. Oxford Ser. 5 (1934), 293-301.

[2]

D. H. Lehmer, On imaginary quadratic fields whose class number is unity, Bull. Amer. Math. Soc. 39 (1933), 360.

[3]

C. Jordan, Calculus of finite differences, 2nd ed., Chelsea, New York, 1947.

[4]

N. E. Norlund, Mémoire sur le calcul aux differences Finies, Acta Math. 44 (1923), 71-212. MR 1555184

[5]

5. J. F. Steffensen, Interpolation, 2nd ed., Chelsea, New York, 1950. MR 0036799 (12:164d)

[6]

National Bureau of Standards, Table of natural logarithms for arguments between zero and five to sixteen decimal places, Applied Mathematics Series No. 31, U. S. Government Printing Office, Washington, D. C., 1953. MR 0057608 (15:255d)