@article{DMDICO_2016_36_2_a0,
     author = {Bouafia, D. and Moussaoui, T. and O{\textquoteright}Regan, O{\textquoteright}Regan},
     title = {Existence of solutions for a second order problem on the half-line via {Ekeland's} variational principle},
     journal = {Discussiones Mathematicae. Differential Inclusions, Control and Optimization},
     pages = {131--140},
     publisher = {mathdoc},
     volume = {36},
     number = {2},
     year = {2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMDICO_2016_36_2_a0/}
}