@article{MOMA_1974__78_186338,
     author = {Michael Heymann and Arie Feuer},
     title = {On a {Theorem} by {W.} {Hahn.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {391--394},
     publisher = {mathdoc},
     volume = {78},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1974__78_186338/}
}