Calude, C. S.; Dinneen, M. J.; Shu, C.-K. Computing a Glimpse of Randomness(PDF). Exper. Math. 2002, 11: 361–370 [2022-09-29]. (原始内容存档(PDF)于2022-10-18).
Calude, C. S.; Dinneen, M. J.; Shu, C.-K. Computing a Glimpse of Randomness(PDF). Exper. Math. 2002, 11: 361–370 [2022-09-29]. (原始内容存档(PDF)于2022-10-18).