@article{DAN_1963_148_5_a28,
     author = {Yu. S. Varshavskii and A. B. Sheinin},
     title = {The entropy of systems containing scarcely, distinguishable components},
     journal = {Doklady Akademii Nauk},
     pages = {1099--1101},
     publisher = {mathdoc},
     volume = {148},
     number = {5},
     year = {1963},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1963_148_5_a28/}
}