TY  - JOUR
AU  - Petzeltová, Hana
TI  - Periodic solutions of the equation $u_{tt}+u_{xxxx}=\varepsilon f(\cdot,\cdot,u,u_t)$
JO  - Czechoslovak Mathematical Journal
PY  - 1973
SP  - 269
EP  - 285
VL  - 23
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1973.101166/
DO  - 10.21136/CMJ.1973.101166
LA  - en
ID  - 10_21136_CMJ_1973_101166
ER  -