@article{ITA_1991__25_5_423_0,
     author = {Krob, Daniel},
     title = {Matrix versions of aperiodic $K$-rational identities},
     journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
     pages = {423--444},
     publisher = {EDP-Sciences},
     volume = {25},
     number = {5},
     year = {1991},
     mrnumber = {1144008},
     zbl = {0768.68077},
     language = {en},
     url = {http://archive.numdam.org/item/ITA_1991__25_5_423_0/}
}