@incollection{Hasenjager1990,
  author    = {{Gisbert Hasenjager}},
  title     = {{Hasse's Syracuse-Problem und die Rolle der Basen}},
  booktitle = {{Mathesis rationis. Festschrift für Heinrich Schepers}},
  publisher = {{Nodus Publications}},
  year      = {{1990}},
  pages     = {{329--336}},
  isbn      = {{3-89323-229-X}},
  address   = {{Münster}},
  editor    = {{A. Heinekamp and W. Lenzen and M. Schneider}},
}