@article{GDZPPN001167863, title = {Perturbation Theory of Difference Schemes.}, journal = {Numerische Mathematik}, volume = {11}, year = {1968}, pages = {454-458}, zbl = {0179.22303}, url = {http://dml.mathdoc.fr/item/GDZPPN001167863} }
SUNOUCHI, H. Perturbation Theory of Difference Schemes.. Numerische Mathematik, Tome 11 (1968) pp. 454-458. http://gdmltest.u-ga.fr/item/GDZPPN001167863/