Bernd Schattenberg Steffen Balzer Susanne Biundo Realizing Hybrid Planning Systems as Modern Software Environments. 16-22 2007 21 KI 1 http://www.kuenstliche-intelligenz.de/index.php?id=7754&tx_ki_pi1[showUid]=1248&cHash=6d9424bc18 db/journals/ki/ki21.html#SchattenbergBB07