1. A method for unbiased selective sampling, using ranked sets;McIntyre;Aust. J. Agric. Res.,1952
2. P. Yu, Nonparametric estimation in ranked set sampling with concomitant variables, in: Combinatorics and Related Areas and the Eighth International Conference of Forum for Interdisciplinary Mathematics, 2001.
3. Ranked set sampling for ecological research: accounting for the total costs of sampling;Mode;Environmetrics,1999
4. T.R. Dell, The theory of some applications of ranked set sampling, Ph.D. Thesis, University of Georgia, Athens, GA, 1969.
5. Ranked set sampling theory with order statistics background;Dell;Biometrics,1972