1. The estimation of the yields of cereal experiments by sampling for the ratio of grain to total produce;Cochran;J. Agric. Sci.,1940
2. Product method of estimation;Murthy;Sankhyā A,1964
3. Modified ratio estimator using coefficient of variation of auxiliary variable;Sisodia;J.-Indian Soc. Agricultural Statist.,1981
4. The precision of unbiased ratio-type estimators;Goodman;J. Amer. Statist. Assoc.,1958
5. Ratio method to the mean estimation using coefficient of skewness of auxiliary variable;Yan,2010