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@article{MET_1981__28_175815, author = {H. Schneeberger}, title = {The {Problem} of {Optimum} {Stratification} and {Allocation} with q = n {N} > 0}, journal = {Metrika}, pages = {179--190}, publisher = {mathdoc}, volume = {28}, year = {1981}, zbl = {0475.62009}, url = {http://geodesic.mathdoc.fr/item/MET_1981__28_175815/} }
H. Schneeberger. The Problem of Optimum Stratification and Allocation with q = n N > 0. Metrika, Tome 28 (1981), pp. 179-190. http://geodesic.mathdoc.fr/item/MET_1981__28_175815/