@book{BeierleKernIsberner2008buch4ed,
   AUTHOR = "C. Beierle and G. Kern-Isberner",
   TITLE = "Methoden wissensbasierter {S}ysteme - {G}rundlagen, {A}lgorithmen,
            {A}nwendungen",
   EDITIONnnn = {4., verbesserte},
   PUBLISHER = "Vieweg+Teubner Verlag",
   ADDRESS   = {4., verbesserte Auflage},
   YEAR = 2008                       }