@article{10_4064_aa_2_2_212_213,
     author = {Hans Heilbronn},
     title = {On real characters},
     journal = {Acta Arithmetica},
     pages = {212--213},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1936},
     doi = {10.4064/aa-2-2-212-213},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-2-2-212-213/}
}