@article{EJDE_2000__2000__a129,
     author = {Avery,  Richard I. and Davis,  John M. and Henderson,  Johnny},
     title = {Three symmetric positive solutions for {Lidstone} problems by a generalization of the {Leggett-Williams} theorem},
     journal = {Electronic journal of differential equations},
     year = {2000},
     volume = {2000},
     zbl = {0958.34020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a129/}
}