@article{EJDE_2008__2008__a22,
     author = {Avery, Richard and Henderson, Johnny and O'Regan, Donal},
     title = {Functional compression-expansion fixed point theorem},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2008},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a22/}
}