@inproceedings{stumme99numerical,
  address = {Heidelberg},
  author = {Stumme, G. and Wolff, K. E.},
  booktitle = {Advances in Database Technologies. Proc. Intl. Workshop on Data Warehousing and},
  comment = {alpha},
  editor = {Kambayashi, Y. and Lee, Dik Kun and Lim, Ee-Peng and Mohania, M. K. and Masunaga, Y.},
  interhash = {e3ef675c84f6ba5a8cee28cbb98a0b0c},
  intrahash = {2bffb5196bd99d7953c05d322fcfdd66},
  pages = {117-128},
  publisher = {Springer},
  series = {LNCS},
  title = {Numerical Aspects in the Data Model of Conceptual Information Systems},
  url = {http://www.kde.cs.uni-kassel.de/stumme/papers/1998/ER98.pdf},
  volume = 1552,
  year = 1999
}