Optimal Hashing - R. E. Krichevsky (Inf. Control., 1984)

Universal retrieval trees. - R. E. Krichevsky; B. Ya. Ryabko (Discret. Appl. Math., 1985)

Information Compression and Varshamov-Gilbert Bound - R. E. Krichevsky (Inf. Comput., 1987)