@ARTICLE {5264,
author={C. Caleiro and M.P.G. Gouveia and J. Ramos},
doi={10.1093/jigpal/jzp093},
journal={Logic Journal of the IGPL},
title={Hierarchical logical consequence},
year={2011},
month={July},
volume={19},
number={4},
pages={544-565},
ISSN={1367-0751}
}