@article{10_4153_CMB_1983_059_x,
     author = {Cordovil, Raul},
     title = {Oriented {Matroids} and {Geometric} {Sorting}},
     journal = {Canadian mathematical bulletin},
     pages = {351--354},
     year = {1983},
     volume = {26},
     number = {3},
     doi = {10.4153/CMB-1983-059-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1983-059-x/}
}