@inproceedings{Yahia96alogorithmic,
  author = {Yahia, A. and Lakhal, L. and Bordat, J. P. and Cicchetti, R.},
  title = {iO2: An algorithmic method for building inheritance graphs in object
  database design.},
  booktitle = {Proc. 15th Intl. Conf. on Conceptual Modeling},
  publisher = {Springer, Heidelberg},
  year = {1996},
  volume = {1157},
  pages = {422--437}
}