@article{MET_1976__23_186178,
     author = {I. Thomsen},
     title = {A {Comparison} of {Approximately} {Optimal} {Stratification} given {Proportional} {Allocation} with other {Methods} of {Stratification} and {Allocation.}},
     journal = {Metrika},
     pages = {15--26},
     publisher = {mathdoc},
     volume = {23},
     year = {1976},
     zbl = {0331.62012},
     url = {http://geodesic.mathdoc.fr/item/MET_1976__23_186178/}
}