@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/