@INPROCEEDINGS{Kern-Isberner01fFOIKS02,
  AUTHOR = {G. Kern-Isberner},
  TITLE  = {The principle of conditional preservation in belief revision},
  BOOKTITLE = {Proceedings of the Second International Symposium on Foundations of Information and Knowledge Systems, {FoIKS 2002}},
  PUBLISHER = {Springer {LNCS 2284}},  
  PAGES = {105-129},
  YEAR   = 2002    }