Voir la notice de l'article provenant de la source Novi sad journal of mathematics website
@article{NSJOM_1994_24_1a_15, author = {Taka\v{c}i {\DJ}ur{\dj}ica}, title = {The error of approximation for a particular solution}, journal = {Novi Sad Journal of Mathematics}, pages = {187-201}, publisher = {mathdoc}, volume = {24}, number = {1}, year = {1994}, url = {http://geodesic.mathdoc.fr/item/NSJOM_1994_24_1a_15/} }
Takači Đurđica. The error of approximation for a particular solution. Novi Sad Journal of Mathematics, Tome 24 (1994) no. 1. http://geodesic.mathdoc.fr/item/NSJOM_1994_24_1a_15/