@article{DBLP:journals/logcom/Bertossi94,
author = {Leopoldo E. Bertossi},
title = {Circumscription in Data Logic for Data Type Specification},
journal = {J. Log. Comput.},
volume = {4},
number = {1},
year = {1994},
pages = {89-96},
ee = {http://dx.doi.org/10.1093/logcom/4.1.89},
bibsource = {DBLP, http://dblp.uni-trier.de}
}