@article{ITA_1991__25_1_19_0,
     author = {Weber, Andreas and Seidl, Helmut},
     title = {On finitely generated monoids of matrices with entries in $\mathbb {N}$},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {19--38},
     publisher = {EDP-Sciences},
     volume = {25},
     number = {1},
     year = {1991},
     mrnumber = {1104408},
     zbl = {0721.20042},
     language = {en},
     url = {http://www.numdam.org/item/ITA_1991__25_1_19_0/}
}