@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/}
}