@article{EJDE_2012__2012__a29,
     author = {Qian,  Aixia},
     title = {Sing-changing solutions for nonlinear problems with strong resonance},
     journal = {Electronic journal of differential equations},
     year = {2012},
     volume = {2012},
     zbl = {1241.35094},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2012__2012__a29/}
}