@article{MAT_1973_17_3_a6,
     author = {M. E. Hellman and T. M. Cover},
     title = {Learning with finite memory},
     journal = {Matematika},
     pages = {137--156},
     publisher = {mathdoc},
     volume = {17},
     number = {3},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1973_17_3_a6/}
}