@article{DBLP:journals/sLogica/Rosati01,
author = {Riccardo Rosati},
title = {A Sound and Complete Tableau Calculus for Reasoning about
only Knowing and Knowing at Most},
journal = {Studia Logica},
volume = {69},
number = {1},
year = {2001},
pages = {171-191},
ee = {http://dx.doi.org/10.1023/A:1013894629540},
bibsource = {DBLP, http://dblp.uni-trier.de}
}