@article{EJDE_2015__2015__a88,
     author = {Aizicovici, Sergiu and Papageorgiou, Nikolaos S. and Staicu, Vasile},
     title = {Positive solutions for parametric nonlinear periodic problems with competing nonlinearities},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2015},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2015__2015__a88/}
}