@article{EJDE_1998__1998__a1,
     author = {Magnus,  Robert},
     title = {On multi-lump solutions to the non-linear {Schr\"odinger} equation},
     journal = {Electronic journal of differential equations},
     year = {1998},
     volume = {1998},
     zbl = {0907.35046},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_1998__1998__a1/}
}