@article{Heppner1978,
  author    = {{Ernst Heppner}},
  title     = {{Eine Bemerkung zum Hasse-Syracuse Algorithmus}},
  journal   = {{Archiv. Math.}},
  year      = {{1978}},
  volume    = {{31}},
  pages     = {{317--320}},
  note      = {{MR 80d:10007}},
}