@article{MZ_1992__209_2_174348,
     author = {Karl-Heinz Indlekofer and H\'edi Daboussi},
     title = {Two elementary proofs of {Hal\'asz's} theorem.},
     journal = {Mathematische Zeitschrift},
     pages = {43--52},
     publisher = {mathdoc},
     volume = {209},
     number = {2},
     year = {1992},
     zbl = {0724.11045},
     url = {http://geodesic.mathdoc.fr/item/MZ_1992__209_2_174348/}
}