TY  - JOUR
AU  - Liqing Zhang
TI  - Two-sided approximation to periodic solutions of ordinary differential equations.
JO  - Numerische Mathematik
PY  - 1993
SP  - 399
EP  - 410
VL  - 66
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/NUMA_1993__66_3_133769/
ID  - NUMA_1993__66_3_133769
ER  -