@article{GDZPPN00117312X,
title = {On the Possibility of Two-Sided Error Bounds in the Numerical Solution of Initial Value Problems.},
journal = {Numerische Mathematik},
volume = {26},
year = {1976},
pages = {271-300},
zbl = {0314.65035},
url = {http://dml.mathdoc.fr/item/GDZPPN00117312X}
}
Spijker, M.N. On the Possibility of Two-Sided Error Bounds in the Numerical Solution of Initial Value Problems.. Numerische Mathematik, Tome 26 (1976) pp. 271-300. http://gdmltest.u-ga.fr/item/GDZPPN00117312X/