@article{GDZPPN001165011,
title = {On the Two-Stage Iterative Method of Douglas for Mildly Nonlinear Elliptic Difference Equations.},
journal = {Numerische Mathematik},
volume = {6},
year = {1964},
pages = {243-249},
zbl = {0131.14903},
url = {http://dml.mathdoc.fr/item/GDZPPN001165011}
}
GUNN, J.E. On the Two-Stage Iterative Method of Douglas for Mildly Nonlinear Elliptic Difference Equations.. Numerische Mathematik, Tome 6 (1964) pp. 243-249. http://gdmltest.u-ga.fr/item/GDZPPN001165011/