TY  - JOUR
AU  - Papageorgiou, Nikolaos S.
AU  - Staicu, Vasile
TI  - Multiple Nontrivial Solutions for Doubly Resonant Periodic Problems
JO  - Canadian mathematical bulletin
PY  - 2010
SP  - 347
EP  - 359
VL  - 53
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-2010-030-4/
DO  - 10.4153/CMB-2010-030-4
ID  - 10_4153_CMB_2010_030_4
ER  -