Ramchandra, VidyasagarPadmawar, R2014-03-262014-03-261994Metrika, v 41, p 21-27http://hdl.handle.net/10263/5831enMidzuno-Sen strategyVariance estimatorsUnbiasednessUniform non negativityStratificationMeasure of uncertaintyMeasurisationStratification, Midzuno-Sen strategy and nonnegetive unbiased variance estimationArticle