@article{AMI_1999_26_a1,
     author = {Aleksander Grytczuk},
     title = {On a problem connected with matrices over {Z3}},
     journal = {Annales mathematicae et informaticae},
     pages = {9--12},
     year = {1999},
     volume = {26},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMI_1999_26_a1/}
}