@article{10_14708_cm_v51i2_5321,
     author = {P.N. Natarajan},
     title = {The {Schur} and {Steinhaus} {Theorems} for {4-Dimensional} {Matrices} in {Ultrametric} {Fields}},
     journal = {Commentationes Mathematicae},
     pages = { 203--209},
     publisher = {mathdoc},
     volume = {51},
     number = {2},
     year = {2011},
     doi = {10.14708/cm.v51i2.5321},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v51i2.5321/}
}