@article{SF_1982__24_134543,
     author = {I.S. Ponizovskii},
     title = {On irreducible matrix semigroups.},
     journal = {Semigroup forum},
     pages = {117--148},
     publisher = {mathdoc},
     volume = {24},
     year = {1982},
     zbl = {0491.20053},
     url = {http://geodesic.mathdoc.fr/item/SF_1982__24_134543/}
}