Arild Waaler, Johan W. Klüwer, Tore Langholm, Espen H. Lian. Only knowing with degrees of confidence. J. Applied Logic, 5(3):492-518, 2007. [doi]
@article{WaalerKLL07,
title = {Only knowing with degrees of confidence},
author = {Arild Waaler and Johan W. Klüwer and Tore Langholm and Espen H. Lian},
year = {2007},
doi = {10.1016/j.jal.2006.03.007},
url = {http://dx.doi.org/10.1016/j.jal.2006.03.007},
researchr = {https://researchr.org/publication/WaalerKLL07},
cites = {0},
citedby = {0},
journal = {J. Applied Logic},
volume = {5},
number = {3},
pages = {492-518},
}