Chipperfield, J. O., and D. G. Steel (2009), "Design and Estimation for Split Questionnaire Surveys," Journal of Official Statistics, 25, 227-244. ----. (2011), "Efficiency of Split Questionnaire Surveys," Journal of Statistical Planning and Inference, 141, 1925-1932.
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Chipperfield, J. O., Steel, D. G., Calinescu, M. (2009). Design and Estimation for Split Questionnaire Surveys. Journal of Official Statistics, 25 pp. 227-244.
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