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2. Applied Nonparametric Statistics;Daniel,1990
3. An Introduction to Probability Theory and Its Applications, 3rd Edition, Vol. 1;Feller,1968
4. Periods in strings;Guibas;J. Combin. Theory Ser. A,1981
5. String overlaps, pattern matching, and nontransitive games;Guibas;J. Combin. Theory Ser. A,1981