@ARTICLE {4144,
author={A. Sernadas and C. Sernadas and J. Rasga and M. Coniglio},
doi={10.1093/logcom/exp023},
journal={Journal of Logic and Computation},
title={A graph-theoretic account of logics},
year={2009},
month={January},
volume={19},
number={19},
pages={1281-1320},
ISSN={0955-792X}
}