@article{CM_1969__21_4_376_0,
     author = {Flor, Peter},
     title = {On groups of non-negative matrices},
     journal = {Compositio Mathematica},
     pages = {376--382},
     year = {1969},
     publisher = {Wolters-Noordhoff Publishing},
     volume = {21},
     number = {4},
     mrnumber = {257115},
     zbl = {0194.34005},
     language = {en},
     url = {https://www.numdam.org/item/CM_1969__21_4_376_0/}
}