TY  - JOUR
AU  - Changxiu Song
TI  - Positive periodic solutions of
 functional differential equations with infinite delay
JO  - Annales Polonici Mathematici
PY  - 2008
SP  - 75
EP  - 83
VL  - 93
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap93-1-6/
DO  - 10.4064/ap93-1-6
LA  - en
ID  - 10_4064_ap93_1_6
ER  -