@article{GDZPPN00117990X,
title = {Thirteen Ways to Estimate Global Error.},
journal = {Numerische Mathematik},
volume = {50},
year = {1986},
pages = {1-20},
zbl = {0562.65050},
url = {http://dml.mathdoc.fr/item/GDZPPN00117990X}
}
Skeel, Robert D. Thirteen Ways to Estimate Global Error.. Numerische Mathematik, Tome 50 (1986) pp. 1-20. http://gdmltest.u-ga.fr/item/GDZPPN00117990X/