Raymond Hemmecke, Jason Morton, Anne Shiu, Bernd Sturmfels, Oliver Wienand. Three Counter-Examples on Semi-Graphoids. Combinatorics, Probability & Computing, 17(2):239-257, 2008. [doi]
@article{HemmeckeMSSW08,
title = {Three Counter-Examples on Semi-Graphoids},
author = {Raymond Hemmecke and Jason Morton and Anne Shiu and Bernd Sturmfels and Oliver Wienand},
year = {2008},
doi = {10.1017/S0963548307008838},
url = {http://dx.doi.org/10.1017/S0963548307008838},
researchr = {https://researchr.org/publication/HemmeckeMSSW08},
cites = {0},
citedby = {0},
journal = {Combinatorics, Probability & Computing},
volume = {17},
number = {2},
pages = {239-257},
}