Edward W. Ng. Certification of algorithm 385: Exponential integral Ei (x). Communications of the ACM, 13(7):448-449, 1970. [doi]
@article{Ng70-0,
title = {Certification of algorithm 385: Exponential integral Ei (x)},
author = {Edward W. Ng},
year = {1970},
doi = {10.1145/362686.362699},
url = {http://doi.acm.org/10.1145/362686.362699},
researchr = {https://researchr.org/publication/Ng70-0},
cites = {0},
citedby = {0},
journal = {Communications of the ACM},
volume = {13},
number = {7},
pages = {448-449},
}