1. CRC Standard Mathematical Tables, Tenth & Eleventh Editions, RMT 61, MTAC, v. 12, 1958, p. 146.
2. National Bureau of Standards Applied Mathematics Series, No. 5,1949
3. A. Fletcher, J. C. P. Miller, L. Rosenhead, & L. J. Comrie, An Index of Mathematical Tables, Second Edition, Addison-Wesley, Reading, Massachusetts, 1962. (See Vol. I, Art. 7.2, p. 173.)
4. Francis L. Miksa, Table of quadratic partitions 𝑥²+𝑦²=𝑁, RMT 83, MTAC, v. 9, 1955, p. 198.