@article{GDZPPN002457520, title = {The Problem of Optimum Stratification and Allocation with q = n N \> 0}, journal = {Metrika}, volume = {28}, year = {1981}, pages = {179-190}, zbl = {0475.62009}, url = {http://dml.mathdoc.fr/item/GDZPPN002457520} }
Schneeberger, H. The Problem of Optimum Stratification and Allocation with q = n N > 0. Metrika, Tome 28 (1981) pp. 179-190. http://gdmltest.u-ga.fr/item/GDZPPN002457520/