1995
Real Values of the W-Function.
D. A. Barry
,
P. J. Culligan-Hensley
,
S. J. Barry
ACM Trans. Math. Softw., 1995

Algorithm 743: WAPR: A Fortran Routine for Calculating Real Values of the W-Function.
D. A. Barry
,
S. J. Barry
,
P. J. Culligan-Hensley
ACM Trans. Math. Softw., 1995