TY  - JOUR
AU  - Raffoul, Youssef N.
TI  - Positive periodic solutions of nonlinear functional difference equations
JO  - Electronic Journal of Differential Equations
PY  - 2002
VL  - 2002
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/EJDE_2002__2002__a273/
LA  - en
ID  - EJDE_2002__2002__a273
ER  -