@inproceedings{agotnes:m4m-2007b,
title = {Extended Modal Logics for Social Software (extended abstract of invited talk)},
author = {W. van der Hoek and T. {\AA}gotnes and M. Wooldridge},
booktitle = {Proceedings of the 5th Workshop on Methods for Modalities (M4M5)},
year = {2007},
editor = {C. Areces and S. Demri}
}