@article{GDZPPN002451700,
title = {Sampling from Overlapping Subpopulation},
journal = {Metrika},
volume = {16},
year = {1970},
pages = {32-42},
zbl = {0195.48901},
url = {http://dml.mathdoc.fr/item/GDZPPN002451700}
}
Frank, Ove. Sampling from Overlapping Subpopulation. Metrika, Tome 16 (1970) pp. 32-42. http://gdmltest.u-ga.fr/item/GDZPPN002451700/