@article{10_14708_cm_v23i1_6043,
     author = {G. M. Petersen},
     title = {Pairs of matrices and unbounded sequences},
     journal = {Commentationes Mathematicae},
     pages = { 101--107},
     year = {1983},
     volume = {23},
     number = {1},
     doi = {10.14708/cm.v23i1.6043},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v23i1.6043/}
}