@article{MS2_1984__55_166919,
     author = {Jorgen Christian Ridder Ebbesen},
     title = {Helical maps from {LCA-groups} into {Hilbert} spaces.},
     journal = {Mathematica Scandinavica},
     pages = {271--284},
     publisher = {mathdoc},
     volume = {55},
     year = {1984},
     zbl = {0628.43004},
     url = {http://geodesic.mathdoc.fr/item/MS2_1984__55_166919/}
}