@article{10_37236_5042,
     author = {Federico Ardila and Federico Castillo and Jos\'e Alejandro Samper},
     title = {The topology of the external activity complex of a matroid},
     journal = {The electronic journal of combinatorics},
     year = {2016},
     volume = {23},
     number = {3},
     doi = {10.37236/5042},
     zbl = {1344.05036},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/5042/}
}