TY  - JOUR
AU  - Ruyun Ma
TI  - Existence of positive solutions for a nonlinear fourth order
 boundary value problem
JO  - Annales Polonici Mathematici
PY  - 2003
SP  - 79
EP  - 84
VL  - 81
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap81-1-7/
DO  - 10.4064/ap81-1-7
LA  - en
ID  - 10_4064_ap81_1_7
ER  -