@article{DBLP:journals/tocl/BonattiO02,
author = {Piero A. Bonatti and
Nicola Olivetti},
title = {Sequent calculi for propositional nonmonotonic logics},
journal = {ACM Trans. Comput. Log.},
volume = {3},
number = {2},
year = {2002},
pages = {226-278},
ee = {http://doi.acm.org/10.1145/505372.505374},
bibsource = {DBLP, http://dblp.uni-trier.de}
}