Rank-three matroids are Rayleigh.
Wagner, David G.
The Electronic Journal of Combinatorics [electronic only], Tome 12 (2005), / Harvested from The Electronic Library of Mathematics
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Publié le : 2005-01-01
EUDML-ID : urn:eudml:doc:125240 
@article{02221798,
     title = {Rank-three matroids are Rayleigh.},
     journal = {The Electronic Journal of Combinatorics [electronic only]},
     volume = {12},
     year = {2005},
     zbl = {1075.05017},
     language = {en},
     url = {http://dml.mathdoc.fr/item/02221798}
}

Wagner, David G. Rank-three matroids are Rayleigh.. The Electronic Journal of Combinatorics [electronic only], Tome 12 (2005) . http://gdmltest.u-ga.fr/item/02221798/