1. Sampling;D R Bellhouse,1988
2. Bickel, P. J., & Freedman, D. A. (1984). Asymptotic normality and the bootstrap in stratified sampling. Annals of Statistics, 12, 470–482.
3. Chen, J., & Rao, J. N. K. (2007). Asymptotic normality under two-phase sampling designs. Statistica Sinica, 17, 1047–1064.
4. Cochran, W. G. (1977). Sampling techniques (3rd ed.). New York: Wiley.
5. Erdös, P., & Rényi, A. (1959). On the central limit theorem for samples from a finite population. Publication of the Mathematical Institute of the Hungarian Academy of Sciences, 4, 49–61.