Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{NUMA_1993__66_3_133769, author = {Liqing Zhang}, title = {Two-sided approximation to periodic solutions of ordinary differential equations.}, journal = {Numerische Mathematik}, pages = {399--410}, publisher = {mathdoc}, volume = {66}, number = {3}, year = {1993}, zbl = {0799.65077}, url = {http://geodesic.mathdoc.fr/item/NUMA_1993__66_3_133769/} }
Liqing Zhang. Two-sided approximation to periodic solutions of ordinary differential equations.. Numerische Mathematik, Tome 66 (1993) no. 3, pp. 399-410. http://geodesic.mathdoc.fr/item/NUMA_1993__66_3_133769/