@article{Daraz2021,
author = {Daraz, Umer and Khan, Mursala},
year = {2021},
language = {eng},
copyright = {https://creativecommons.org/licenses/by/4.0/},
title = {Estimation of variance of the difference-cum-ratio-type exponential estimator in simple random sampling},
volume = {8},
url = "http://dx.doi.org/10.17169/refubium-31294",
}