Voir la notice de l'article provenant de la source Mathematicac Balkanica website
@article{MABA_2001_15_3-4_a5, author = {M. Racheva}, title = {On {Estimating} of a {Fourth-Order} {Differential} {Equations}}, journal = {Mathematica balkanica}, pages = {239}, publisher = {mathdoc}, volume = {15}, number = {3-4}, year = {2001}, url = {http://geodesic.mathdoc.fr/item/MABA_2001_15_3-4_a5/} }
M. Racheva. On Estimating of a Fourth-Order Differential Equations. Mathematica balkanica, Tome 15 (2001) no. 3-4, p. 239. http://geodesic.mathdoc.fr/item/MABA_2001_15_3-4_a5/