@article{EJDE_2006__2006__a63,
     author = {Hai,  Dang Dinhr},
     title = {Positive solutions for a class of singular boundary value problems},
     journal = {Electronic journal of differential equations},
     year = {2006},
     volume = {2006},
     zbl = {1095.34012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2006__2006__a63/}
}