@ARTICLE{FalappaKern-IsbernerSimari02AIJ02,
  AUTHOR = {Falappa, M.A. and G. Kern-Isberner and Simari, G.R.},
  TITLE = {Explanations, belief revision and defeasible reasoning}, 
  JOURNAL = {Artificial Intelligence},
  VOLUME = 141,
  NUMBER = {1-2},
  PAGES = {1-28},
  YEAR   = 2002    }