Tracy, D SMukhopadhyay, P2013-08-122013-08-121994Pakistan Journal of Statistics,v. 10,p. 575-583http://hdl.handle.net/10263/5552enUnbiased variance estimationNon-negative variance estimationMidzuno strategyMinimaxityExact prop. of estimatorsAdmissibilityOn non-negative unbiased variance estimation for midzuno strategyArticle