@article{ELA_2004__11__a13,
     author = {Bru, Rafael and Coll, Carmen and Romero, Sergio and S\'anchez, Elena},
     title = {Reachability indices of positive linear systems},
     journal = {The electronic journal of linear algebra},
     pages = {88--102},
     publisher = {mathdoc},
     volume = {11},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2004__11__a13/}
}