@article{00147573, title = {Exact, approximate solutions and error bounds for coupled implicit systems of partial differential equations.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {15}, year = {1992}, pages = {663-672}, doi = {10.1155/S0161171292000887}, zbl = {0769.35004}, language = {en}, url = {http://dml.mathdoc.fr/item/00147573} }
Jódar, Lucas. Exact, approximate solutions and error bounds for coupled implicit systems of partial differential equations.. International Journal of Mathematics and Mathematical Sciences, Tome 15 (1992) pp. 663-672. doi : 10.1155/S0161171292000887. http://gdmltest.u-ga.fr/item/00147573/