TY  - JOUR
AU  - Wang, Genqiang
AU  - Yan, Jurang
TI  - Existence theorem of periodic positive solutions for the Rayleigh equation of retarded type.
JO  - Portugaliae mathematica
PY  - 2000
SP  - 153
EP  - 160
VL  - 57
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/PORMA_2000__57_2_48773/
LA  - en
ID  - PORMA_2000__57_2_48773
ER  -