TY  - JOUR
AU  - Bingwen Liu
TI  - Existence and uniqueness of periodic solutions for
  a kind of Duffing equation with two deviating arguments
JO  - Annales Polonici Mathematici
PY  - 2006
SP  - 247
EP  - 258
VL  - 89
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap89-3-2/
DO  - 10.4064/ap89-3-2
LA  - en
ID  - 10_4064_ap89_3_2
ER  -