1. An estimator using auxiliary information;Srivastava;Calcutta Stat. Assoc. Bull.,1967
2. A modified ratio estimator using coefficient of variation of auxiliary variable;Sisodia;J. Indian Soc. Agric. Stat.,1981
3. Ratio and product type exponential estimators;Bahl;J. Inf. Optim. Sci.,1991
4. Use of transformed auxiliary variable in estimating the finite population mean;Upadhyaya;Biom. J.,1999
5. Use of known correlation coefficient in estimating the finite population mean;Singh;Stat. Transit.,2003