Peter Gärdenfors. Qualitative probability as an intensional logic. J. Philosophical Logic, 4(2):171-185, 1975. [doi]
@article{Gardenfors75,
title = {Qualitative probability as an intensional logic},
author = {Peter Gärdenfors},
year = {1975},
doi = {10.1007/BF00693272},
url = {http://dx.doi.org/10.1007/BF00693272},
researchr = {https://researchr.org/publication/Gardenfors75},
cites = {0},
citedby = {0},
journal = {J. Philosophical Logic},
volume = {4},
number = {2},
pages = {171-185},
}