@article{SLC_2017_78B_a30,
     author = {Gaku Liu},
     title = {A {Counterexample} to the {Extension} {Space} {Conjecture} for {Realizable} {Oriented} {Matroids}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {78B},
     year = {2017},
     url = {http://geodesic.mathdoc.fr/item/SLC_2017_78B_a30/}
}