@article{EJDE_2013__2013__a23,
     author = {Djebali, Smail and Saifi, Ouiza and Zahar, Samira},
     title = {Singular boundary-value problems with variable coefficients on the positive half-line},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2013},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2013__2013__a23/}
}