@article{BeierleKernIsberner2009ijar,
AUTHOR = {C. Beierle and G. Kern-Isberner},
TITLE = {Formal similarities and differences among qualitative
         conditional semantics},
JOURNAL = {International Journal of Approximate Reasoning}, 
VOLUME = 50,
NUMBER = 9,
Pages = "1333--1346",
MONTH = nov,
YEAR = 2009   }