References
- Madow , William G. and Madow , Lillian H. 1944 . “On the Theory of Systematic Sampling, I,” . Annals of Mathematical Statistics , 15 March : 1 – 24 .
- Kendall , M. G. and Stuart , A. 1968 . Advanced Theory of Statistics, , 2nd edition , Vol. 3 , 361 – 362 . London : Charles Griffin and Co. .