Kott, Phillip S., and Dan Liao. “Providing Double Protection for Unit Nonresponse With a Nonlinear Calibration-Weighting Routine”. Survey Research Methods 6, no. 2 (July 11, 2012): 105–111. Accessed June 19, 2024. https://ojs.ub.uni-konstanz.de/srm/article/view/5076.