@article{IM2_2006_70_6_a7,
     author = {M. E. Shirokov},
     title = {Entropy characteristics of subsets of {states.~I}},
     journal = {Izvestiya. Mathematics },
     pages = {1265--1292},
     publisher = {mathdoc},
     volume = {70},
     number = {6},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2006_70_6_a7/}
}