@article{EJDE_2011__2011__a20,
     author = {Song,  Wenjing and Gao,  Wenjie},
     title = {Positive solutions for a second-order system with integral boundary conditions},
     journal = {Electronic journal of differential equations},
     year = {2011},
     volume = {2011},
     zbl = {1211.34029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2011__2011__a20/}
}