References
- Cochran , W.G. 1977 . Sampling Techniques , New York : John Willey and Sons .
- Moser , B.K. and Fei , W. 1991 . A New Sequential Design Based on the Robbins-Monro Procedure . Metrika , 38 : 321 – 333 .
- Serfling , R.J. 1980 . Approximation Theorems of Mathematical Statistics , New York : John Wiley and Sons .