6O. B. Sheynin.Early history of the theory of probability[J].Archive for History of Exact Sciences.1977(3)
7Bagni G.T.,D‘ Argenzio M.P.P,Luchini S.R.Ancient Zara game and teaching of Probability:an experimental research in Ital- ian Hight School. Proceedings of MCOTS- 2 . 1999
8Sheynin O.B.,A.P.Youschkevitch.Early History of the Theory of Probability[]..1976