TY  - JOUR
AU  - Andres, Ján
TI  - Periodic derivative of solutions to nonlinear differential equations
JO  - Czechoslovak Mathematical Journal
PY  - 1990
SP  - 353
EP  - 360
VL  - 40
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1990.102388/
DO  - 10.21136/CMJ.1990.102388
LA  - en
ID  - 10_21136_CMJ_1990_102388
ER  -