@ARTICLE {3930,
author={D. Qiu Qiu and F. Liu},
doi={10.1109/TFUZZ.2008.924212},
journal={IEEE Transactions on Fuzzy Systems},
title={Fuzzy discrete-event systems under fuzzy observability and a test algorithm},
year={2009},
month={January},
volume={17},
number={3},
pages={578-589},
ISSN={1063-6706}
}