@article{10_4064_sm8421_3_2016,
     author = {Leo Livshits and Gordon MacDonald and Laurent Marcoux and Heydar Radjavi},
     title = {Universal bounds for positive matrix semigroups},
     journal = {Studia Mathematica},
     pages = {143--153},
     publisher = {mathdoc},
     volume = {232},
     number = {2},
     year = {2016},
     doi = {10.4064/sm8421-3-2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm8421-3-2016/}
}