@ARTICLE{Kern-Isberner00c,
  AUTHOR = {G. Kern-Isberner},
  TITLE  = {Conditional indifference and conditional preservation},
  JOURNAL = {Journal of Applied Non-Classical Logics},
  VOLUME = 11,
  NUMBER = {1-2},
  PAGES = {85-106},
  YEAR   = 2001    }