@article{05610864,
title = {Error evaluation of approximate solutions for sum-difference equations in two variables.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {2009},
year = {2009},
zbl = {1173.26318},
language = {en},
url = {http://dml.mathdoc.fr/item/05610864}
}
Pachpatte, Baburao G. Error evaluation of approximate solutions for sum-difference equations in two variables.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 2009 (2009) . http://gdmltest.u-ga.fr/item/05610864/