@article{EJDE_2007__2007__a4,
     author = {Xia, Li and Yao, Zhengan},
     title = {Positive solutions for a class of singular boundary-value problems},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2007},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a4/}
}