@inproceedings{DBLP:conf/ecsqaru/Schaub91, title = {On Commitment and Cumulativity in Default Logics}, author = {Schaub, Torsten}, booktitle = {{ECSQARU}}, pages = {305--309}, publisher = {Springer}, series = {Lecture Notes in Computer Science}, volume = {548}, year = {1991} }