@article{KYB_1989__25_4_a4,
     author = {Caso, Covadonga and Gil, Mar{\'\i}a Angeles},
     title = {Estimating income inequality in the stratified sampling from complete data. {I.} {The} unbiased estimation and applications},
     journal = {Kybernetika},
     pages = {298--311},
     publisher = {mathdoc},
     volume = {25},
     number = {4},
     year = {1989},
     mrnumber = {1015034},
     zbl = {0682.62086},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_1989__25_4_a4/}
}