1. Feller, W.: An introduction to probability theory and its applications, 3rd edn. Wiley 1968
2. Flajolet, P., Kirschenhofer, P., Tichy, R.: Discrepancy of sequences infinite strings. In: Coll. Math.; Janos Bolyai Soc., Proc. 1986 Conf. on Irregularities of partitions, to appear
3. Goulden, I., Jackson, D.: Combinatorial enumerations. New York: Wiley 1983
4. Guibas, L.J., Odlyzko, A.M.: Maximal prefix-synchronized codes. SIAM J. Appl. Math. 35, 401–418 (1978)
5. Guibas, L.J., Odlyzko, A.M.: Periods in strings. J. Comb. Th. (A) 30, 19–42 (1981)