@InProceedings{HerzigVarzinczak-AiML04,
author = {Herzig, Andreas and Varzinczak, Ivan José},
title = {On modularity of theories},
booktitle = {Proc. Int. Workshop on Advances in Modal Logic (AiML 2004)},
editor = {Reynolds, Mark and Wansing, Heinrich},
publisher = {},
address = {Manchester},
year = {2004},
}