3. The method as recited in claim 1 wherein said suitable clustering operation is a statistical clustering operation.
3. The method as recited in claim 1 wherein said suitable clustering operation is a statistical clustering operation. 4. The method as recited in claim 3 wherein said step of creating a co-citation list is further comprised of the step of for each pair in said co-citation list, generating a co-citation frequency indicating the number of times each pair was cited by the same document, and wherein said statistical clustering operations uses said co-citation frequency.