@article{GDZPPN00117715X,
title = {A Contribution to the Theory of Condition.},
journal = {Numerische Mathematik},
volume = {39},
year = {1982},
pages = {85-96},
zbl = {0465.65025},
url = {http://dml.mathdoc.fr/item/GDZPPN00117715X}
}
Geurts, A.J. A Contribution to the Theory of Condition.. Numerische Mathematik, Tome 39 (1982) pp. 85-96. http://gdmltest.u-ga.fr/item/GDZPPN00117715X/