@ARTICLE {2540,
author={M. Coniglio and A. Sernadas and C. Sernadas},
doi={},
journal={Journal of Logic and Computation},
title={Fibring logics with topos semantics},
year={2003},
month={January},
volume={13},
number={4},
pages={595-624},
ISSN={0955-792X}
}