@inproceedings{DBLP:conf/jelia/EiterL00, title = "New Tractable Cases in Default Reasoning from Conditional Knowledge Bases", author = "Thomas Eiter and Thomas Lukasiewicz", year = "2000", booktitle = "Proceedings of the 7th European Workshop on Logics in Artificial Intelligence, JELIA 2000, Malaga, Spain, September 29 - October 2, 2000", editor = "Manuel Ojeda-Aciego and Inman P. de Guzm{\'a}n and Gerhard Brewka and Lu\'{\i}s Moniz Pereira", isbn = "3-540-41131-3", pages = "313-328", publisher = "Springer", series = "Lecture Notes in Computer Science", url = "http://dx.doi.org/10.1007/3-540-40006-0_22", volume = "1919", }