Peter Linz. Accurate floating-point summation. Communications of the ACM, 13(6):361-362, 1970. [doi]
@article{Linz70,
title = {Accurate floating-point summation},
author = {Peter Linz},
year = {1970},
doi = {10.1145/362384.362498},
url = {http://doi.acm.org/10.1145/362384.362498},
researchr = {https://researchr.org/publication/Linz70},
cites = {0},
citedby = {0},
journal = {Communications of the ACM},
volume = {13},
number = {6},
pages = {361-362},
}