TY  - JOUR
AU  - Yankson, Ernest
TI  - Existence and positivity of solutions for a nonlinear periodic differential equation
JO  - Archivum mathematicum
PY  - 2012
SP  - 261
EP  - 270
VL  - 48
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.5817/AM2012-4-261/
DO  - 10.5817/AM2012-4-261
LA  - en
ID  - 10_5817_AM2012_4_261
ER  -