Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MAT_1959_3_5_a6, author = {D. Blackwell}, title = {The entropy of functions of finite-state {Markov} chains}, journal = {Matematika}, pages = {143--150}, publisher = {mathdoc}, volume = {3}, number = {5}, year = {1959}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1959_3_5_a6/} }
D. Blackwell. The entropy of functions of finite-state Markov chains. Matematika, Tome 3 (1959) no. 5, pp. 143-150. http://geodesic.mathdoc.fr/item/MAT_1959_3_5_a6/