@article{DiDonato:1986:CIG,
author = {DiDonato, A. R. and Morris, A. H.},
title = {Computation of the incomplete gamma function ratios
and their inverses},
journal = {ACM Trans. Math. Software},
fjournal = {Association for Computing Machinery. Transactions on
Mathematical Software},
volume = {12},
number = {4},
year = {1986},
pages = {377–393},
issn = {0098-3500},
doi = {10.1145/22721.23109},
zblno = {0623.65016}}