@article {130063,
	title = {A General Jackknife within Each Stratum Variance Estimator},
	journal = {International Journal of Engineering and Applied Sciences},
	volume = {3},
	year = {2016},
	pages = {65-67},
	author = {A. M. Mousa and S. M. Elsayed and Abdel Latif, S. H.}
}
