@article{Amos:1983:UAE,
author = {Amos, D. E.},
title = {Uniform asymptotic expansions for exponential integrals
$E_n(x)$ and {B}ickley functions ${\rm {K}i}_n(x)$},
journal = {ACM Trans. Math. Software},
fjournal = {Association for Computing Machinery. Transactions on
Mathematical Software},
volume = {9},
year = {1983},
number = {4},
pages = {467–479},
issn = {0098-3500},
coden = {ACMSCU},
mrclass = {65D20 (33A70)},
mrnumber = {MR0791977 (87a:65043)},
mrreviewer = {Marietta J. Tretter},
doi = {10.1145/356056.356063},
zblno = {0545.33002}}