TY  - JOUR
AU  - Matas, Vladimír
TI  - On non-existence of periodic solutions of an important differential equation
JO  - Applications of Mathematics
PY  - 1973
SP  - 213
EP  - 226
VL  - 18
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/AM.1973.103474/
DO  - 10.21136/AM.1973.103474
LA  - en
ID  - 10_21136_AM_1973_103474
ER  -