1

Gautschi, W. Computational aspects of three-term recurrence relations, SIAM Rev. 9 (1967), 24-82.

2

Gautschi, W. Zur Numerik rekurrenter Rclationen, Comouting 9 (1972), 107-126.

3

Walter Gautschi , Bruce J. Klein, Remark on algorithm 282 [S22] derivatives of ex/x, cos(x)/x, and sin (x)/x, Communications of the ACM, v.13 n.1, p.53-54, Jan. 1970  [doi>10.1145/361953.361988]

4

Kourganoff, V., and Busbridge, I.W. Basic Methods #1 Tranfer Problems. Clarendon Press, Oxford, 1952.

5

Miller, G.F. Tables of generalized exponential integrals. National Physical Lab. Math. Tables, Vol. 3, H.M. Stationery Office, London, 1960.

6

Miller, J., and Hurst, R.P. Simplified calculation of the exponential integral. Math. Tables Other Aids' Comp. 12 (1958), 187--193.

7

Perron, O. Die Lehre yon den Kettenbriichen, Vol. I1. B.G. Teubner, Stuttgart, Germany, 1957.

8

Rutishauser, H. Description o f ALGOL 60, Handbook for Atttomatic Computatiott, Vol. I, Pt. a. Springer, New York, 1967.

9

Wrench, J.W., Jr. A new calculation of Euler's constant. Math. Tables Other Aids Comp. 6 (1952), 255.

D. E. Amos, Uniform Asymptotic Expansions for Exponential Integrals E_n(x) and Bickley Functions Kin (x), ACM Transactions on Mathematical Software (TOMS), v.9 n.4, p.467-479, Dec. 1983

Donald E. Amos, Computation of Exponential Integrals, ACM Transactions on Mathematical Software (TOMS), v.6 n.3, p.365-377, Sept. 1980

Donald E. Amos, Computation of exponential integrals of a complex argument, ACM Transactions on Mathematical Software (TOMS), v.16 n.2, p.169-177, June 1990

Walter Gautschi: colleagues