@article{EJDE_2007__2007__a264,
     author = {Georgiev,  Svetlin Georgiev},
     title = {Positive periodic solutions for the {Korteweg-de} {Vries} equation},
     journal = {Electronic journal of differential equations},
     year = {2007},
     volume = {2007},
     zbl = {1115.35110},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2007__2007__a264/}
}