@article{MAT_1960_4_5_a8,
     author = {D. Blackwell and L. Breiman and A. J. Thomasian},
     title = {Proof of {Shannon's} transmission theorem for finite-state indecomposable channels},
     journal = {Matematika},
     pages = {123--136},
     year = {1960},
     volume = {4},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1960_4_5_a8/}
}