@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/