1. Cochran WG (1940) The estimation of the yields of the cereal experiments by sampling for the ratio of grain to total produce, The Journal of Agricultural Science 30(2): 262-275.
2. Murthy MN (1964) Product method of estimation. Sankhyā: The Indian Journal of Statistics 26(1): 69-74.
3. Singh HP, Tailor R (2003) Use of known correlation coefficient in estimating the finite population means, Statistics in Transition 6(4): 555-560.
4. Ekaette Inyang Enang, Victoria Matthew Akpan, Emmanuel John Ekpenyong (2014) Alternative ratio estimator of population mean in simple random sampling, Journal of Mathematics Research 6(3).
5. HousilaP Singh, Surya K Pal, Vishal Mehta (2016) A generalized class of dual to product-cum-dual to ratiotype estimators of finite population mean in sample surveys. Appl Math Inf Sci Lett 4(1): 25-33.